| Year | Value | | 2022 | 181,956 | | 2021 | 179,452 | | 2020 | 179,429 | | 2019 | 180,031 | | 2018 | 178,016 | | 2017 | 174,573 | | 2016 | 172,047 | | 2015 | 166,407 | | 2014 | 160,146 | | 2013 | 148,623 | | 2012 | 129,199 | | 2011 | 112,562 | | 2010 | 100,581 | | 2009 | 91,859 | | 2008 | 83,822 | | 2007 | 76,586 | | 2006 | 70,009 | | 2005 | 64,406 | | 2004 | 60,516 | | 2003 | 57,872 | | 2002 | 55,580 | | 2001 | 53,493 | | 2000 | 51,445 | | 1999 | 49,286 | | 1998 | 46,943 | | 1997 | 44,423 | | 1996 | 41,793 | | 1995 | 39,673 | | 1994 | 39,841 | | 1993 | 42,404 | | 1992 | 42,441 | | 1991 | 34,386 | | 1990 | 40,599 | | 1989 | 51,156 | | 1988 | 46,924 | | 1987 | 42,788 | | 1986 | 38,825 | | 1985 | 35,779 | | 1984 | 33,497 | | 1983 | 31,402 | | 1982 | 29,640 | | 1981 | 28,131 | | 1980 | 26,665 | | 1979 | 25,242 | | 1978 | 24,033 | | 1977 | 22,945 | | 1976 | 21,908 | | 1975 | 20,630 | | 1974 | 19,153 | | 1973 | 17,751 | | 1972 | 16,392 | | 1971 | 15,068 | | 1970 | 13,788 | | 1969 | 12,517 | | 1968 | 11,244 | | 1967 | 10,033 | | 1966 | 8,943 | | 1965 | 8,064 | | 1964 | 7,371 | | 1963 | 6,769 | | 1962 | 6,235 | | 1961 | 5,724 | | 1960 | 5,214 |
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