| Year | Value | | 2022 | 118,514 | | 2021 | 123,490 | | 2020 | 129,408 | | 2019 | 135,916 | | 2018 | 142,771 | | 2017 | 147,147 | | 2016 | 148,108 | | 2015 | 146,958 | | 2014 | 143,907 | | 2013 | 139,676 | | 2012 | 135,077 | | 2011 | 130,411 | | 2010 | 126,369 | | 2009 | 123,325 | | 2008 | 121,013 | | 2007 | 119,411 | | 2006 | 118,365 | | 2005 | 117,679 | | 2004 | 117,224 | | 2003 | 116,785 | | 2002 | 116,080 | | 2001 | 114,880 | | 2000 | 113,169 | | 1999 | 110,825 | | 1998 | 108,036 | | 1997 | 105,434 | | 1996 | 103,269 | | 1995 | 101,479 | | 1994 | 100,104 | | 1993 | 99,123 | | 1992 | 98,241 | | 1991 | 97,281 | | 1990 | 96,060 | | 1989 | 94,296 | | 1988 | 91,491 | | 1987 | 87,398 | | 1986 | 82,413 | | 1985 | 77,032 | | 1984 | 71,572 | | 1983 | 66,237 | | 1982 | 61,355 | | 1981 | 57,114 | | 1980 | 53,446 | | 1979 | 50,356 | | 1978 | 47,620 | | 1977 | 44,987 | | 1976 | 42,530 | | 1975 | 40,338 | | 1974 | 38,540 | | 1973 | 37,324 | | 1972 | 36,806 | | 1971 | 36,971 | | 1970 | 37,634 | | 1969 | 38,382 | | 1968 | 38,595 | | 1967 | 38,070 | | 1966 | 37,125 | | 1965 | 36,208 | | 1964 | 35,762 | | 1963 | 35,811 | | 1962 | 35,694 | | 1961 | 35,110 | | 1960 | 34,324 |
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