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United States: US Census Bureau 2002 and United States department of commerce 1993; Canada: Statistics Canada 1995 and 2002; Greenland: Statistics Greenland, 1994 and 2002; Faroe Islands: Faroe Islands Statistics 2002; Iceland: Statistics Iceland, 2002; Norway: Ststistics Norway, 2002; Sweden' Statistics Sweden, 2002; Finland: Statistics Finland, 2002; RussiaL State Committee for Statistics, 2003; Republican information and publication center, 1992; State Committee of the Russian Federation for statistics 1992; World Wild Fund (WWF) Norway.