Below is a list of the top fifty countries containing the largest percentage of people who identify as atheist, agnostic, or non-believer in God.
Country Total Pop.(2004) % Atheist/actual # Agnostic/Nonbeliever in God (minimum - maximum)
1 Sweden 8,986,000 46-85% 4,133,560-7,638,100
2 Vietnam 82,690,000 81% 66,978,900
3 Denmark 5,413,000 43-80% 2,327,590-4,330,400
4 Norway 4,575,000 31-72% 1,418,250-3,294,000
5 Japan 127,333,000 64-65% 81,493,120-82,766,450
6 Czech Republic 10,246,100 54-61% 5,328,940-6,250,121
7 Finland 5,215,000 28-60% 1,460,200-3,129,000
8 France 60,424,000 43-54% 25,982,320-32,628,960
9 South Korea 48,598,000 30%-52% 14,579,400-25,270,960
10 Estonia 1,342,000 49% 657,580
11 Germany 82,425,000 41-49% 33,794,250-40,388,250
12 Russia 143,782,000 24-48% 34,507,680-69,015,360
13 Hungary 10,032,000 32-46% 3,210,240-4,614,720
14 Netherlands 16,318,000 39-44% 6,364,020-7,179,920
15 Britain 60,271,000 31-44% 18,684,010-26,519,240
16 Belgium 10,348,000 42-43% 4,346,160-4,449,640
17 Bulgaria 7,518,000 34-40% 2,556,120-3,007,200
18 Slovenia 2,011,000 35-38% 703,850-764,180
19 Israel 6,199,000 15-37% 929,850-2,293,630
20 Canada 32,508,000 19-30% 6,176,520-9,752,400
21 Latvia 2,306,000 20-29% 461,200-668,740
22 Slovakia 5,424,000 10-28% 542,400-1,518,720
23 Switzerland 7,451,000 17-27% 1,266,670-2,011,770
24 Austria 8,175,000 18-26% 1,471,500-2,125,500
25 Australia 19,913,000 24-25% 4,779,120-4,978,250
26 Taiwan 22,750,000 24% 5,460,000
27 Spain 40,281,000 15-24% 6,042,150-9,667,440
28 Iceland 294,000 16-23% 47,040-67,620
29 New Zealand 3,994,000 20-22% 798,800-878,680
30 Ukraine 47,732,000 20% 9,546,400
31 Belarus 10,311,000 17% 1,752,870
32 Greece 10,648,000 16% 1,703,680
33 North Korea 22,698,000 15% ( ? ) 3,404,700
34 Italy 58,057,000 6-15% 3,483,420-8,708,550
35 Armenia 2,991,000 14% 418,740
36 China 1,298,848,000 8-14% ( ? ) 103,907,840-181,838,720
37 Lithuania 3,608,000 13% 469,040
38 Singapore 4,354,000 13% 566,020
39 Uruguay 3,399,000 12% 407,880
40 Kazakhstan 15,144,000 11-12% 1,665,840-1,817,280
41 Estonia 1,342,000 11% 147,620
42 Mongolia 2,751,000 9% 247,590
43 Portugal 10,524,000 4-9% 420,960-947,160
44 United States 293,028,000 3-9% 8,790,840-26,822,520
45 Albania 3,545,000 8% 283,600
46 Argentina 39,145,000 4-8% 1,565,800-3,131,600
47 Kyrgyzstan 5,081,000 7% 355,670
48 Dominican Rep. 8,834,000 7% 618,380
49 Cuba 11,309,000 7% ( ? ) 791,630
50 Croatia 4,497,000 7% 314,790
Taken from:
http://www.pitzer.edu/academics/faculty/zuckerman/atheism.html
It seems as though the nations who are poorest have the lowest numbers of non believers. America being an odd exception to the rule...
America being the richest and most powerful nation on earth...and yet having a lower rate of unbelievers than Mongolia or Kazakhstan. Christianity being the leading religion in America by a landslide....I'm beginning to see as others see America.
There are other exceptions....see if you can find them.
Another interesting link:
http://www.adherents.com/Religions_By_Adherents.html