Nato's Libya operations have cost millions and involved thousands of airmen and sailors. But who's contributed to Operation Unified Protector? That's the official name for the attacks on the Gadaffi regime's bases and tanks by Nato aircraft and ships, plus the enforcement of the no-fly zone and the arms embargo.

We have been monitoring the Nato situation updates which are released each day and give details of the operations - key targets hit, sorties flown and ships boarded.

They give a picture of over 3,000 targets hit in 14,202 strike sorties - the bulk of them (716) in Tripoli, followed by 492 in Brega. Nato classifies the biggest number, 304, as ammunition dumps, with nearly 100 tanks and 55 rocket launchers struck.

Nato ships have also stopped over 3,000 vessels and boarded another 250 while enforcing the arms embargo.

Data journalism can help us find out who was most involved at the beginning too. Nato, which has run operations in Libya since the beginning of April, doesn't give out details of individual member's efforts so we went to each country's defence ministry direct to find out for ourselves.

It doesn't cover the whole war (although we will be updating it). But we set some very specific parameters: details for the first week of operations, operations taking place week commencing 2 May and totals for the whole operation, ending 5 May. We asked each country:

• How many aircraft, ships and military personnel are in the region?

• How many attacks and sorties has each country been involved in?

• Which base are they operating from?

By combining official responses, scraping the defence ministry websites of each country and news reports, we assembled the most complete breakdown of the Nato operation yet published.

What we got back provides a unique insight into the division of labour in an operation costing millions of dollars and tying up thousands of personnel - nearly 13,000 across 18 countries.

What it shows is that, besides the US - which dominates operations with over 8,000 personnel in the area in several ships and aircraft at the peak of the first weeks of the war - the weight of the conflict has fallen on the British, Italians, French and Canadians. The British have flown around 1,300 sorties, some 25% of the total, followed by the French with 1,200 and the Italians with 600. The Canadians, who have the HMCS Charllottetown in the region, have taken part in over 350 sorties up to the 5 May this year.

Simultaneously, the US, UK, Canada were heavily involved in combat operations in Afghanistan.

But it's not just the usual suspects. Denmark and Norway have both taken part in attack strikes on Libya - dropping nearly 700 bombs between them. Sweden has 122 personnel and eight aircraft in the region and Belgium has flown 60 sorties.

In contrast, the Arab states involved - Jordan, Qatar and the UAE - have been reluctant to scale up their role. Between them they have 125 personnel in the operation and 32 aircraft, however Jordan does not take part in combat operations. Qatar has flown joint patrols with French forces on at least three occasions, but only to enforce the no-fly zone.

The UN's new body in Libya has not been able to compile any accurate figures for the number of civilian dead.

The full data is below. Do you have any more details to add to the spreadsheet? What can you do with the data?

Data summary

Nato operations in Libya by country Click heading to sort. Download this data Country no. of personnel No. of air- craft Est no. of sorties flown, from beg of war until 5 May 2011 no. of cruise missiles fired Main air base Belgium 170 6 60 Araxos base in south-western greece Bulgaria 160 0 0 Canada 560 11 358 Trapani-Birgi and Sigonella Denmark 120 4 161 0 Sigonella, Sicily France 800 29 1,200 currently operating from French Air Bases of Avord, Nancy, St Dizier, Dijon and Istres, as well as Evreux and Orléans for planes engaged in logistics. Greece 0 0 0 Aktion and Andravida military air fields in Crete Italy 12 600 Gioia del Colle, Trapani, Sigonella, Decimomannu, Amendola, Aviano, Pantelleria Jordan 30 12 Cerenecia, Libya Netherlands 200 7 sardinian base, decimomannu Norway 140 6 100 Souda Bay, Crete Qatar 60 8 Souda Bay, Crete Romania 205 Spain 500 7 Sweden 122 8 78 0 Sigonella Turkey 6 Sigonella Air Base in Italy UAE 35 12 Decimomannu, Sardinia UK 1300 28 1,300 18 Gioia del Colle, Italy and RAF Akrotiri, Cyprus US 8507 153 2,000 228 TOTALS 12,909 309 5,857 246

• DATA: Nato operations by country details

• DATA: Nato operations totals (updated each day)

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