Year | Value | 2022 | 22,181,000 | 2021 | 22,156,000 | 2020 | 21,919,000 | 2019 | 21,803,000 | 2018 | 21,670,000 | 2017 | 21,506,813 | 2016 | 21,425,494 | 2015 | 21,336,697 | 2014 | 21,239,457 | 2013 | 21,131,756 | 2012 | 21,017,147 | 2011 | 20,859,743 | 2010 | 20,668,557 | 2009 | 20,482,477 | 2008 | 20,285,643 | 2007 | 20,078,655 | 2006 | 19,870,706 | 2005 | 19,673,866 | 2004 | 19,490,431 | 2003 | 19,303,180 | 2002 | 19,110,707 | 2001 | 18,920,275 | 2000 | 18,776,371 | 1999 | 18,670,411 | 1998 | 18,560,798 | 1997 | 18,449,123 | 1996 | 18,322,506 | 1995 | 18,177,572 | 1994 | 18,011,744 | 1993 | 17,825,611 | 1992 | 17,624,457 | 1991 | 17,416,596 | 1990 | 17,204,094 | 1989 | 16,990,575 | 1988 | 16,773,736 | 1987 | 16,547,139 | 1986 | 16,317,995 | 1985 | 16,092,338 | 1984 | 15,872,577 | 1983 | 15,658,442 | 1982 | 15,438,753 | 1981 | 15,198,918 | 1980 | 14,943,645 | 1979 | 14,680,387 | 1978 | 14,414,816 | 1977 | 14,159,052 | 1976 | 13,910,170 | 1975 | 13,662,873 | 1974 | 13,418,276 | 1973 | 13,169,737 | 1972 | 12,914,457 | 1971 | 12,654,651 | 1970 | 12,388,769 | 1969 | 12,119,207 | 1968 | 11,846,815 | 1967 | 11,571,008 | 1966 | 11,299,721 | 1965 | 11,035,224 | 1964 | 10,774,086 | 1963 | 10,517,531 | 1962 | 10,267,067 | 1961 | 10,022,888 | 1960 | 9,783,871 |
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