Year | Value | 2022 | 35,618,159 | 2021 | 34,892,618 | 2020 | 33,865,844 | 2019 | 32,328,089 | 2018 | 30,581,559 | 2017 | 28,612,594 | 2016 | 26,659,454 | 2015 | 24,871,004 | 2014 | 23,199,696 | 2013 | 21,842,875 | 2012 | 20,656,840 | 2011 | 19,780,479 | 2010 | 19,238,403 | 2009 | 18,850,774 | 2008 | 18,606,406 | 2007 | 18,505,920 | 2006 | 18,347,314 | 2005 | 18,152,028 | 2004 | 18,050,313 | 2003 | 17,953,321 | 2002 | 17,669,786 | 2001 | 17,208,129 | 2000 | 16,713,990 | 1999 | 16,185,608 | 1998 | 15,568,167 | 1997 | 14,986,165 | 1996 | 14,463,717 | 1995 | 13,952,480 | 1994 | 13,513,572 | 1993 | 13,066,676 | 1992 | 12,567,320 | 1991 | 12,164,355 | 1990 | 11,796,923 | 1989 | 11,340,185 | 1988 | 10,865,798 | 1987 | 10,485,994 | 1986 | 10,160,167 | 1985 | 9,841,244 | 1984 | 9,608,653 | 1983 | 9,466,759 | 1982 | 9,267,583 | 1981 | 8,984,369 | 1980 | 8,690,104 | 1979 | 8,373,280 | 1978 | 8,034,460 | 1977 | 7,750,134 | 1976 | 7,550,346 | 1975 | 7,369,557 | 1974 | 7,161,061 | 1973 | 6,965,318 | 1972 | 6,807,234 | 1971 | 6,637,797 | 1970 | 6,428,845 | 1969 | 6,187,909 | 1968 | 5,931,991 | 1967 | 5,706,696 | 1966 | 5,517,542 | 1965 | 5,379,210 | 1964 | 5,348,928 | 1963 | 5,371,490 | 1962 | 5,363,121 | 1961 | 5,382,105 | 1960 | 5,486,675 |
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