Here are some statistics you might find interesting, ranking countries on their number of registered OA Archives (absolute and relative to population size, counting only countries with 4 or more Archives):
Sources: Population size: http://www.geohive.com/global/world.php OA Archives: http://archives.eprints.org/eprints.php?action=browse Country Archs pop(M) ratio rank USA (127) 293.1M 43 UK (54) 60.3M 90 3rd/M* Germany (38) 82.4M 46 Canada (28) 32.5M 86 4th/M France (19) 60.4M 32 Brazil (18) 184.1M 10 Italy (16) 58.1M 28 Austral.(16) 19.9M 80 5th/M Netherl.(16) 16.3M 98 2nd/M** Sweden (12) 7,5M 160 1st/M*** India (7) 1B 1 Belgium (5) 10.4M 48 Portug. (5) 10.5M 48 Finland (4) 5.2M 77 6th/M Denmark (4) 5.4M 75 7th/M So Afr. (4) 42.7M 9 Hungary (4) 10.0M 40 Spain (4) 40.3M 10 Japan (4) 127.3M 3 Top 12 for number of OA archives per million population: (1) Sweden (2) Netherlands (3) UK (4) Canada (5) Australia (6) Finland (7) Denmark (8) Belgium (9) Portugal (10) Germany (11) US (12) Hungary Top (and only) 6 for Registered Self-Archiving Policies (1) France (2) Germany (3) UK (4) Australia (5) Portugal (6) US Policy Registry: http://www.eprints.org/signup/fulllist.php Country ranks for number and ratio of self-archived articles (15% worldwide): Partial data for Biology and Social Sciences available here: http://www.crsc.uqam.ca/lab/chawki/analyse_pays.htm ------------------------------------------------------------------------- Current national tally of members of American Scientist Open Access Forum: http://amsci-forum.amsci.org/archives/American-Scientist-Open-Access-Forum.html Not counted: 98 COM (International) 62 ORG (International) 12 NET (International) By country: 134 EDU + 10 GOV (United States) 129 UK (United Kingdom) 47 CA (Canada) 31 DE (Germany) 22 AU (Australia) 21 FR (France) 17 IT (Italy) 11 IN (India) 10 CH (Switzerland) 10 CN (China) 10 NL (Netherlands) 8 JP (Japan) 8 PT (Portugal) 8 SE (Sweden) 6 BR (Brazil) 6 FI (Finland) 4 BE (Belgium) 4 ES (spain) 3 DK (Denmark) 3 IL (Israel) 3 ZA (South Africa) 2 AT (Austria) 2 HU (Hungary) 2 IE (Ireland) 2 MX (Mexico) 2 NZ (New Zealand) 2 SG (Singapore) (19 other countries, 1 each)