Now Fiji has finally tasted Olympic success in the Rugby Sevens, a total of 73 countries have still never won a medal.

Kosovo, one of the world's newest countries, also broke its duck this week, with Majlinda Kelmendi claiming gold in the women's 52kg judo competition.

So that leaves the likes of Bolivia, Chad, Timor-Leste, Cambodia, Cape Verde, Bosnia and Herzegovina, Albania, Bhutan, Benin, Belize, Bangladesh, Andorra, Gambia, Guinea, Turkmenistan, and all those shown in orange on the map above.

Some will not be opening their account in 2016. Bhutan, for example, brought just two athletes - an archer called Karma, who lost in the first round of the women's individual, and the female shooter Kunzang Lenchu, who failed to get through qualification in the 10m air rifle.

Others still have a chance. Amel Tuka of Bosnia and Herzegovina will race in the men's 800m heats today and is a decent bet after picking up a bronze at the World Championships in Beijing last year.

The most successful Olympic nation of all time?

Such has been the US dominance of the modern summer Olympics that they have won almost three times as many medals as the next most successful country (the UK). The map below shows those countries that won the most medals between 1896 and 2012.

Russia and Germany may feel they deserve loftier positions, but for the sake of simplicity we've discounted all medals earned by the Soviet Union, West and East Germany, and all other nations that no longer exist, such as Czechoslovakia and Yugoslavia.

Top 20 all-time Summer Olympic medal winners

United States - 2399 United Kingdom - 780 France - 671 Germany - 573 Italy - 549 Sweden - 483 Hungary - 476 China - 473 Australia - 468 Japan - 398 Russia - 395 Finland - 302 Romania - 301 Canada - 279 Poland - 271 Netherlands - 266 South Korea - 243 Bulgaria - 214 Cuba - 209 Switzerland - 185

Countries with the most medals per million residents

Given the size of the US and China, perhaps it is unfair to rate them as the most successful Olympic nation. Indeed, if you divide each country's medal count by its population, the rankings are very different - and it is Finland that comes out on top, followed by its Scandinavian neighbours Sweden.

Finland - 55.8 medals per million people Sweden - 50.9 Hungary - 47.8 Bahamas - 33.9 Denmark - 32.1 Norway - 29.4 Bulgaria - 29.1 Estonia - 25.5 East Germany (now defunct) - 25.4 Jamaica - 24.8

To give an idea of how Olympic success has changed over the past 60 or 70 years (US dominance excluded), we've also plotted maps showing the most successful countries in the two most recent Olympic Games hosted by London - in 1948 and 2012.

Finland is arguably the most successful Olympic nation of all time

In 1948 (above), just 136 countries competed, with the Soviet Union among the most notable absentees. The US was top, while Sweden stormed to second in the medal table, with European countries filling out the rest of the top 10.

The best in 1948

By 2012 (below), China, Japan and South Korea had come to the fore, with Sweden falling to 29th place.

The best in 2012

And finally, let us not forget the Winter Olympics. Our final map shows the most successful countries between 1924 (Chamonix) and 2014 (Sochi). Finally, the US is knocked off its perch, with Norway taking the top spot.