Corruption around the world remains a deeply entrenched, global concern according to Transparency International's 2011 Corruption Perceptions Index (CPI) - the world's most credible measure of of domestic, public sector corruption.

This year, two thirds of countries covered by the index were given scores less than 5 - which means they are considered significantly corrupt.

The CPI scores countries on a scale of zero to 10, with zero indicating high levels of corruption and 10, low levels. And the most corrupt places in the world are not the most surprising. Unstable governments, often with a legacy of conflict, continue to dominate the bottom rungs of the CPI. Afghanistan and Myanmar share second to last place with a score of 1.5, with Somalia and North Korea - measured for the first time - coming in last with a score of 1.

The world's most peaceful countries score the best. In the 2011 CPI, New Zealand is top with a score of 9.5, followed by Denmark, Finland, Sweden and Singapore.

Four countries and territories besides North Korea are included for the first time: the Bahamas, St Lucia, St Vincent and the Grenadines, and Suriname.

Transparency International (TI) chair Huguette Labelle says corruption remains a major global issue, highlighted by widespread demonstrations in 2011: "This year we have seen corruption on protestor's banners be they rich or poor. Whether in a Europe hit by debt crisis or an Arab world starting a new political era, leaders must head the demands for better government."

Wealth seems no easy antidote to corruption: some relatively rich countries, including Russia, fall at the bottom of the global league table. Meanwhile, some of the world's poorer states do comparatively well: Botswana, Bhutan, Cape Verde, and Rwanda all appear among the 50 "cleanest" countries.

While the index has been published annually since 1995, TI warns against comparing scores over time, as sources for the index change each year. However, the Berlin-based NGO notes that two general trends pop out regardless: Arab Spring countries, and many Eurozone countries – particularly those affected by the financial crisis – are doing worse and worse.

Most Arab Spring countries rank in the lower half of the index, with scores below 4. Many of the lowest-scoring European countries are those hardest hit by the financial and debt crises – including Greece and Italy.

The UK ranks 16th, along with Austria and the Barbados, and just ahead of Belgium and Ireland. The US ranks 24th.

The Index, which is closely watched by investors, economists, and civil society campaigners, is based on expert assessments and data from 17 surveys from 13 independent institutions, covering issues such as access to information, bribery of public officials, kickbacks in public procurement, and the enforcement of anti-corruption laws. While critics note that measuring perceptions of corruption is not the same as measuring corruption itself, the latter is almost impossible to do - as the corrupt are usually keen to cover up their tracks, hard data on graft and bribery is notoriously difficult to come by.

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Data summary

Transparency international world corruption index (1=least corrupt) Click heading to sort table. Download this data 2011 rank Country / Territory CPI 2011 Score CPI 2010 Score CPI 2009 Score CPI 2008 Score 1 New Zealand 9.5 9.3 9.4 9.3 2 Denmark 9.4 9.3 9.3 9.3 2 Finland 9.4 9.2 8.9 9 4 Sweden 9.3 9.2 9.2 9.3 5 Singapore 9.2 9.3 9.2 9.2 6 Norway 9.0 8.6 8.6 7.9 7 Netherlands 8.9 8.8 8.9 8.9 8 Switzerland 8.8 8.7 9 9 8 Australia 8.8 8.7 8.7 8.7 10 Canada 8.7 8.9 8.7 8.7 11 Luxembourg 8.5 8.5 8.2 8.3 12 Hong Kong 8.4 8.4 8.2 8.1 13 Iceland 8.3 8.5 8.7 8.9 14 Germany 8.0 7.9 8 7.9 14 Japan 8.0 7.8 7.7 7.3 16 Austria 7.8 7.9 7.9 8.1 16 Barbados 7.8 7.8 7.4 7 16 United Kingdom 7.8 7.6 7.7 7.7 19 Ireland 7.5 8 8 7.7 19 Belgium 7.5 7.1 7.1 7.3 21 Bahamas 7.3 22 Qatar 7.2 7.7 7 6.5 22 Chile 7.2 7.2 6.7 6.9 24 United States 7.1 7.1 7.5 7.3 25 Uruguay 7.0 6.9 6.7 6.9 25 France 7.0 6.8 6.9 6.9 25 Saint Lucia 7.0 28 United Arab Emirates 6.8 6.3 6.5 5.9 29 Estonia 6.4 6.5 6.6 6.6 30 Cyprus 6.3 6.3 6.6 6.4 31 Spain 6.2 6.1 6.1 6.5 32 Portugal 6.1 6 5.8 6.1 32 Botswana 6.1 5.8 5.6 5.8 32 Taiwan 6.1 5.8 5.6 5.7 35 Slovenia 5.9 6.4 6.6 6.7 36 Israel 5.8 6.1 6.1 6 36 Saint Vincent and the Grenadines 5.8 38 Bhutan 5.7 5.7 5 5.2 39 Puerto Rico 5.6 5.8 5.8 5.8 39 Malta 5.6 5.6 5.2 5.8 41 Poland 5.5 5.3 5 4.6 41 Cape Verde 5.5 5.1 5.1 5.1 43 Korea (South) 5.4 5.4 5.5 5.6 44 Brunei 5.2 5.5 5.5 0 44 Dominica 5.2 5.2 5.9 6 46 Mauritius 5.1 5.4 5.4 5.5 46 Macau 5.1 5 5.3 5.4 46 Bahrain 5.1 4.9 5.1 5.4 49 Rwanda 5.0 4 3.3 3 50 Costa Rica 4.8 5.3 5.3 5.1 50 Oman 4.8 5.3 5.5 5.5 50 Lithuania 4.8 5 4.9 4.6 50 Seychelles 4.8 4.8 4.8 4.8 54 Hungary 4.6 4.7 5.1 5.1 54 Kuwait 4.6 4.5 4.1 4.3 56 Jordan 4.5 4.7 5 5.1 57 Saudi Arabia 4.4 4.7 4.3 3.5 57 Czech Republic 4.4 4.6 4.9 5.2 57 Namibia 4.4 4.4 4.5 4.5 60 Malaysia 4.3 4.4 4.5 5.1 61 Turkey 4.2 4.4 4.4 4.6 61 Latvia 4.2 4.3 4.5 5 61 Cuba 4.2 3.7 4.4 4.3 64 South Africa 4.1 4.5 4.7 4.9 64 Georgia 4.1 3.8 4.1 3.9 66 Slovakia 4.0 4.3 4.5 5 66 Croatia 4.0 4.1 4.1 4.4 66 Montenegro 4.0 3.7 3.9 3.4 69 Ghana 3.9 4.1 3.9 3.9 69 Samoa 3.9 4.1 4.5 4.4 69 Macedonia, FYR 3.9 4.1 3.8 3.6 69 Italy 3.9 3.9 4.3 4.8 73 Tunisia 3.8 4.3 4.2 4.4 73 Brazil 3.8 3.7 3.7 3.5 75 Romania 3.6 3.7 3.8 3.8 75 China 3.6 3.5 3.6 3.6 77 Vanuatu 3.5 3.6 3.2 2.9 77 Lesotho 3.5 3.5 3.3 3.2 77 Gambia 3.5 3.2 2.9 1.9 80 El Salvador 3.4 3.6 3.4 3.9 80 Thailand 3.4 3.5 3.4 3.5 80 Peru 3.4 3.5 3.7 3.6 80 Greece 3.4 3.5 3.8 4.7 80 Colombia 3.4 3.5 3.7 3.8 80 Morocco 3.4 3.4 3.3 3.5 86 Panama 3.3 3.6 3.4 3.4 86 Bulgaria 3.3 3.6 3.8 3.6 86 Serbia 3.3 3.5 3.5 3.4 86 Jamaica 3.3 3.3 3 3.1 86 Sri Lanka 3.3 3.2 3.1 3.2 91 Trinidad and Tobago 3.2 3.6 3.6 3.6 91 Liberia 3.2 3.3 3.1 2.4 91 Bosnia and Herzegovina 3.2 3.2 3 3.2 91 Zambia 3.2 3 3 2.8 95 Albania 3.1 3.3 3.2 3.4 95 India 3.1 3.3 3.4 3.4 95 Kiribati 3.1 3.2 2.8 3.1 95 Swaziland 3.1 3.2 3.6 3.6 95 Tonga 3.1 3 3 2.4 100 Malawi 3.0 3.4 3.3 2.8 100 Djibouti 3.0 3.2 2.8 3 100 Mexico 3.0 3.1 3.3 3.6 100 Burkina Faso 3.0 3.1 3.6 3.5 100 Sao Tome & Principe 3.0 3 2.8 2.7 100 Argentina 3.0 2.9 2.9 2.9 100 Benin 3.0 2.8 2.9 3.1 100 Gabon 3.0 2.8 2.9 3.1 100 Indonesia 3.0 2.8 2.8 2.6 100 Tanzania 3.0 2.7 2.6 3 100 Madagascar 3.0 2.6 3 3.4 100 Suriname 3.0 112 Egypt 2.9 3.1 2.8 2.8 112 Senegal 2.9 2.9 3 3.4 112 Moldova 2.9 2.9 3.3 2.9 112 Algeria 2.9 2.9 2.8 3.2 112 Kosovo 2.9 2.8 0 0 112 Vietnam 2.9 2.7 2.7 2.7 118 Bolivia 2.8 2.8 2.7 3 118 Mali 2.8 2.7 2.8 3.1 120 Guatemala 2.7 3.2 3.4 3.1 120 Kazakhstan 2.7 2.9 2.7 2.2 120 Solomon Islands 2.7 2.8 2.8 2.9 120 Mongolia 2.7 2.7 2.7 3 120 Mozambique 2.7 2.7 2.5 2.6 120 Ethiopia 2.7 2.7 2.7 2.6 120 Ecuador 2.7 2.5 2.2 2 120 Bangladesh 2.7 2.4 2.4 2.1 120 Iran 2.7 2.2 1.8 2.3 129 Dominican Republic 2.6 3 3 3 129 Armenia 2.6 2.6 2.7 2.9 129 Syria 2.6 2.5 2.6 2.1 129 Honduras 2.6 2.4 2.5 2.6 129 Philippines 2.6 2.4 2.4 2.3 134 Guyana 2.5 2.7 2.6 2.6 134 Eritrea 2.5 2.6 2.6 2.6 134 Niger 2.5 2.6 2.9 2.8 134 Lebanon 2.5 2.5 2.5 3 134 Nicaragua 2.5 2.5 2.5 2.5 134 Sierra Leone 2.5 2.4 2.2 1.9 134 Pakistan 2.5 2.3 2.4 2.5 134 Maldives 2.5 2.3 2.5 2.8 134 Cameroon 2.5 2.2 2.2 2.3 143 Timor-Leste 2.4 2.5 2.2 2.2 143 Belarus 2.4 2.5 2.4 2 143 Uganda 2.4 2.5 2.5 2.6 143 Azerbaijan 2.4 2.4 2.3 1.9 143 Togo 2.4 2.4 2.8 2.7 143 Nigeria 2.4 2.4 2.5 2.7 143 Mauritania 2.4 2.3 2.5 2.8 143 Comoros 2.4 2.1 2.3 2.5 143 Russia 2.4 2.1 2.2 2.1 152 Ukraine 2.3 2.4 2.2 2.5 152 Tajikistan 2.3 2.1 2 2 154 Zimbabwe 2.2 2.4 2.2 1.8 154 Nepal 2.2 2.2 2.3 2.7 154 Paraguay 2.2 2.2 2.1 2.4 154 Côte d´Ivoire 2.2 2.2 2.1 2 154 Congo Republic 2.2 2.1 1.9 1.9 154 Papua New Guinea 2.2 2.1 2.1 2 154 Guinea-Bissau 2.2 2.1 1.9 1.9 154 Central African Republic 2.2 2.1 2 2 154 Laos 2.2 2.1 2 2 154 Kenya 2.2 2.1 2.2 2.1 164 Yemen 2.1 2.2 2.1 2.3 164 Cambodia 2.1 2.1 2 1.8 164 Guinea 2.1 2 1.8 1.6 164 Kyrgyzstan 2.1 2 1.9 1.8 168 Libya 2.0 2.2 2.5 2.6 168 Congo, Dem Rep 2.0 2 1.9 1.7 168 Angola 2.0 1.9 1.9 1.9 168 Chad 2.0 1.7 1.6 1.6 172 Venezuela 1.9 2 1.9 1.9 172 Equatorial Guinea 1.9 1.9 1.8 1.7 172 Burundi 1.9 1.8 1.8 1.9 175 Haiti 1.8 2.2 1.8 1.4 175 Iraq 1.8 1.5 1.5 1.3 177 Sudan 1.6 1.6 1.5 1.6 177 Turkmenistan 1.6 1.6 1.8 1.8 177 Uzbekistan 1.6 1.6 1.7 1.8 180 Myanmar 1.5 1.4 1.4 1.3 180 Afghanistan 1.5 1.4 1.3 1.5 182 Somalia 1.0 1.1 1.1 1 182 Korea (North) 1.0

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