Year | Value | 2022 | 30,181,937 | 2021 | 29,547,690 | 2020 | 28,829,317 | 2019 | 28,042,342 | 2018 | 27,333,488 | 2017 | 26,643,455 | 2016 | 25,970,228 | 2015 | 25,381,619 | 2014 | 24,672,275 | 2013 | 23,853,670 | 2012 | 23,105,778 | 2011 | 22,244,569 | 2010 | 21,498,290 | 2009 | 20,942,092 | 2008 | 20,264,376 | 2007 | 19,916,271 | 2006 | 19,614,729 | 2005 | 18,869,118 | 2004 | 18,254,002 | 2003 | 17,583,264 | 2002 | 16,325,389 | 2001 | 15,323,859 | 2000 | 15,228,282 | 1999 | 15,027,717 | 1998 | 14,444,061 | 1997 | 13,909,967 | 1996 | 13,392,069 | 1995 | 12,868,486 | 1994 | 12,127,356 | 1993 | 11,000,794 | 1992 | 9,482,568 | 1991 | 8,460,100 | 1990 | 8,429,959 | 1989 | 8,422,410 | 1988 | 8,203,141 | 1987 | 8,225,793 | 1986 | 8,395,637 | 1985 | 8,515,214 | 1984 | 8,362,433 | 1983 | 8,185,365 | 1982 | 8,358,450 | 1981 | 9,307,672 | 1980 | 10,489,394 | 1979 | 10,981,014 | 1978 | 11,001,526 | 1977 | 10,845,486 | 1976 | 10,676,535 | 1975 | 10,498,997 | 1974 | 10,300,800 | 1973 | 10,092,624 | 1972 | 9,886,067 | 1971 | 9,691,641 | 1970 | 9,501,003 | 1969 | 9,311,235 | 1968 | 9,128,927 | 1967 | 8,951,970 | 1966 | 8,782,038 | 1965 | 8,617,815 | 1964 | 8,458,694 | 1963 | 8,308,019 | 1962 | 8,163,985 | 1961 | 8,026,804 | 1960 | 7,898,093 |
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