Bubulle presented some statistics on Debian developers (DD) per country and the number of active DDs. It's hard to compare 223 active in USA to 23 in Sweden so I made some percentage counting to make them comparable.

Country Total Active Ratio
Switzerland 21 21 100,00%
Belgium 13 13 100,00%
Russian Federation 7 7 100,00%
Czech Republic 6 6 100,00%
India 5 5 100,00%
Bulgaria 4 4 100,00%
Colombia 3 3 100,00%
Croatia 3 3 100,00%
Mexico 2 2 100,00%
Turkey 2 2 100,00%
Uruguay 2 2 100,00%
Chile 1 1 100,00%
Costa Rica 1 1 100,00%
Latvia 1 1 100,00%
Lithuania 1 1 100,00%
Madagascar 1 1 100,00%
Peru 1 1 100,00%
Slovakia 1 1 100,00%
Venezuela 1 1 100,00%
Brazil 19 18 94,74%
Norway 13 12 92,31%
Argentina 7 6 85,71%
Japan 41 35 85,37%
Germany 197 167 84,77%
France 96 81 84,38%
Spain 49 41 83,67%
Israel 6 5 83,33%
Italy 40 33 82,50%
Finland 27 22 81,48%
Austria 22 17 77,27%
Poland 13 10 76,92%
Denmark 8 6 75,00%
Portugal 4 3 75,00%
United Kingdom 97 70 72,16%
Canada 56 40 71,43%
New Zealand 14 10 71,43%
Ireland 7 5 71,43%
Sweden 34 23 67,65%
Hungary 12 8 66,67%
Korea, Republic of 6 4 66,67%
Greece 3 2 66,67%
United States 348 223 64,08%
Australia 56 35 62,50%
Netherlands 38 23 60,53%
China 8 4 50,00%
South Africa 8 4 50,00%
Egypt 2 1 50,00%
Romania 2 1 50,00%
Thailand 1 0 0,00%