| Year | Value | | 2022 | 232,590 | | 2021 | 231,795 | | 2020 | 230,869 | | 2019 | 232,559 | | 2018 | 237,690 | | 2017 | 244,036 | | 2016 | 249,935 | | 2015 | 254,530 | | 2014 | 256,548 | | 2013 | 253,902 | | 2012 | 245,058 | | 2011 | 229,813 | | 2010 | 210,001 | | 2009 | 188,212 | | 2008 | 168,767 | | 2007 | 155,110 | | 2006 | 146,831 | | 2005 | 141,783 | | 2004 | 139,023 | | 2003 | 137,404 | | 2002 | 135,223 | | 2001 | 132,568 | | 2000 | 128,492 | | 1999 | 123,042 | | 1998 | 117,418 | | 1997 | 111,934 | | 1996 | 106,896 | | 1995 | 105,406 | | 1994 | 106,810 | | 1993 | 107,512 | | 1992 | 107,590 | | 1991 | 107,180 | | 1990 | 105,930 | | 1989 | 103,776 | | 1988 | 101,058 | | 1987 | 97,786 | | 1986 | 93,987 | | 1985 | 90,808 | | 1984 | 87,545 | | 1983 | 82,638 | | 1982 | 76,610 | | 1981 | 69,963 | | 1980 | 63,115 | | 1979 | 55,744 | | 1978 | 47,958 | | 1977 | 40,775 | | 1976 | 34,925 | | 1975 | 31,446 | | 1974 | 29,328 | | 1973 | 26,893 | | 1972 | 24,273 | | 1971 | 21,641 | | 1970 | 19,183 | | 1969 | 17,121 | | 1968 | 15,744 | | 1967 | 15,128 | | 1966 | 14,817 | | 1965 | 14,417 | | 1964 | 13,862 | | 1963 | 13,070 | | 1962 | 11,977 | | 1961 | 10,768 | | 1960 | 9,691 |
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