Year | Value | 2019 | 41,174,000 | 2018 | 40,601,888 | 2017 | 39,971,036 | 2016 | 39,310,492 | 2015 | 38,650,060 | 2014 | 37,994,585 | 2013 | 37,342,505 | 2012 | 36,709,561 | 2011 | 36,113,020 | 2010 | 35,564,244 | 2009 | 35,072,771 | 2008 | 34,634,721 | 2007 | 34,230,796 | 2006 | 33,832,700 | 2005 | 33,419,608 | 2004 | 32,985,599 | 2003 | 32,535,902 | 2002 | 32,074,318 | 2001 | 31,608,455 | 2000 | 31,144,047 | 1999 | 30,680,242 | 1998 | 30,214,694 | 1997 | 29,750,113 | 1996 | 29,289,965 | 1995 | 28,836,439 | 1994 | 28,390,751 | 1993 | 27,951,499 | 1992 | 27,514,969 | 1991 | 27,075,877 | 1990 | 26,630,265 | 1989 | 26,177,682 | 1988 | 25,718,937 | 1987 | 25,252,941 | 1986 | 24,778,751 | 1985 | 24,296,183 | 1984 | 23,804,245 | 1983 | 23,304,392 | 1982 | 22,801,877 | 1981 | 22,303,791 | 1980 | 21,815,316 | 1979 | 21,339,067 | 1978 | 20,874,096 | 1977 | 20,417,758 | 1976 | 19,965,707 |
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