| Year | Value | | 2022 | 37,265,512 | | 2021 | 36,612,136 | | 2020 | 35,705,341 | | 2019 | 34,621,622 | | 2018 | 33,429,225 | | 2017 | 32,163,558 | | 2016 | 30,921,473 | | 2015 | 29,728,956 | | 2014 | 28,605,645 | | 2013 | 27,531,059 | | 2012 | 26,454,387 | | 2011 | 25,425,747 | | 2010 | 24,391,822 | | 2009 | 23,326,433 | | 2008 | 22,220,602 | | 2007 | 21,117,910 | | 2006 | 20,105,230 | | 2005 | 19,103,681 | | 2004 | 18,089,778 | | 2003 | 17,168,301 | | 2002 | 16,410,050 | | 2001 | 15,764,548 | | 2000 | 15,212,793 | | 1999 | 14,769,497 | | 1998 | 14,363,473 | | 1997 | 14,007,000 | | 1996 | 13,703,936 | | 1995 | 13,357,837 | | 1994 | 12,914,225 | | 1993 | 12,417,419 | | 1992 | 11,940,777 | | 1991 | 11,523,915 | | 1990 | 11,127,935 | | 1989 | 10,680,958 | | 1988 | 10,220,078 | | 1987 | 9,783,273 | | 1986 | 9,351,150 | | 1985 | 8,915,368 | | 1984 | 8,485,855 | | 1983 | 8,042,859 | | 1982 | 7,604,591 | | 1981 | 7,196,670 | | 1980 | 6,813,148 | | 1979 | 6,467,236 | | 1978 | 6,158,600 | | 1977 | 5,867,779 | | 1976 | 5,599,683 | | 1975 | 5,339,612 | | 1974 | 5,084,833 | | 1973 | 4,852,119 | | 1972 | 4,650,836 | | 1971 | 4,485,175 | | 1970 | 4,347,160 | | 1969 | 4,213,119 | | 1968 | 4,058,644 | | 1967 | 3,896,168 | | 1966 | 3,751,728 | | 1965 | 3,628,662 | | 1964 | 3,522,181 | | 1963 | 3,428,796 | | 1962 | 3,342,106 | | 1961 | 3,286,444 | | 1960 | 3,279,048 |
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