Year | Value | 2022 | 26,950,981 | 2021 | 26,694,841 | 2020 | 26,323,574 | 2019 | 25,997,634 | 2018 | 25,659,107 | 2017 | 25,261,358 | 2016 | 24,753,869 | 2015 | 23,715,034 | 2014 | 22,231,049 | 2013 | 20,811,722 | 2012 | 19,618,041 | 2011 | 18,943,549 | 2010 | 19,248,126 | 2009 | 20,157,741 | 2008 | 21,187,446 | 2007 | 22,188,356 | 2006 | 22,738,407 | 2005 | 22,681,356 | 2004 | 22,192,136 | 2003 | 21,426,396 | 2002 | 20,736,572 | 2001 | 20,339,854 | 2000 | 20,327,566 | 1999 | 20,654,536 | 1998 | 21,193,524 | 1997 | 21,644,780 | 1996 | 21,902,352 | 1995 | 21,997,923 | 1994 | 21,921,643 | 1993 | 21,719,760 | 1992 | 21,378,762 | 1991 | 20,929,418 | 1990 | 20,352,603 | 1989 | 19,541,060 | 1988 | 18,353,027 | 1987 | 16,971,895 | 1986 | 15,710,390 | 1985 | 14,892,380 | 1984 | 14,949,554 | 1983 | 15,790,612 | 1982 | 17,070,411 | 1981 | 18,375,232 | 1980 | 19,243,450 | 1979 | 19,511,185 | 1978 | 19,384,018 | 1977 | 19,123,142 | 1976 | 18,811,599 | 1975 | 18,514,631 | 1974 | 18,183,225 | 1973 | 17,864,194 | 1972 | 17,564,667 | 1971 | 17,262,101 | 1970 | 16,991,654 | 1969 | 16,647,568 | 1968 | 16,165,652 | 1967 | 15,645,536 | 1966 | 15,177,416 | 1965 | 14,658,056 | 1964 | 14,160,265 | 1963 | 13,803,080 | 1962 | 13,455,296 | 1961 | 13,089,752 | 1960 | 12,719,809 |
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