Year | Value | 2022 | 38,132 | 2021 | 36,266 | 2020 | 34,369 | 2019 | 32,676 | 2018 | 31,247 | 2017 | 30,097 | 2016 | 29,271 | 2015 | 28,751 | 2014 | 28,503 | 2013 | 28,461 | 2012 | 28,531 | 2011 | 28,667 | 2010 | 28,925 | 2009 | 29,321 | 2008 | 29,506 | 2007 | 29,122 | 2006 | 28,157 | 2005 | 26,842 | 2004 | 25,753 | 2003 | 25,403 | 2002 | 25,618 | 2001 | 25,974 | 2000 | 26,275 | 1999 | 26,391 | 1998 | 26,211 | 1997 | 25,819 | 1996 | 25,387 | 1995 | 24,994 | 1994 | 24,646 | 1993 | 24,290 | 1992 | 23,831 | 1991 | 23,205 | 1990 | 22,189 | 1989 | 20,977 | 1988 | 20,080 | 1987 | 19,462 | 1986 | 18,990 | 1985 | 18,669 | 1984 | 18,506 | 1983 | 18,491 | 1982 | 18,605 | 1981 | 18,832 | 1980 | 19,078 | 1979 | 19,254 | 1978 | 19,350 | 1977 | 19,353 | 1976 | 19,232 | 1975 | 18,958 | 1974 | 18,480 | 1973 | 17,753 | 1972 | 16,907 | 1971 | 16,162 | 1970 | 15,632 | 1969 | 15,296 | 1968 | 15,133 | 1967 | 15,105 | 1966 | 15,077 | 1965 | 14,948 | 1964 | 14,725 | 1963 | 14,421 | 1962 | 14,051 | 1961 | 13,713 | 1960 | 13,480 |
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