| Year | Value | | 2022 | 84,031 | | 2021 | 81,578 | | 2020 | 79,225 | | 2019 | 77,213 | | 2018 | 75,603 | | 2017 | 74,274 | | 2016 | 73,233 | | 2015 | 72,381 | | 2014 | 71,400 | | 2013 | 70,218 | | 2012 | 68,925 | | 2011 | 67,480 | | 2010 | 65,868 | | 2009 | 64,035 | | 2008 | 61,950 | | 2007 | 59,943 | | 2006 | 58,217 | | 2005 | 56,601 | | 2004 | 55,076 | | 2003 | 53,662 | | 2002 | 52,046 | | 2001 | 50,086 | | 2000 | 48,019 | | 1999 | 45,965 | | 1998 | 43,969 | | 1997 | 42,059 | | 1996 | 40,276 | | 1995 | 38,658 | | 1994 | 37,202 | | 1993 | 35,920 | | 1992 | 34,911 | | 1991 | 34,266 | | 1990 | 34,172 | | 1989 | 34,485 | | 1988 | 34,880 | | 1987 | 35,320 | | 1986 | 35,769 | | 1985 | 36,172 | | 1984 | 36,477 | | 1983 | 36,645 | | 1982 | 36,657 | | 1981 | 36,508 | | 1980 | 36,193 | | 1979 | 35,449 | | 1978 | 33,183 | | 1977 | 29,613 | | 1976 | 25,872 | | 1975 | 22,191 | | 1974 | 18,902 | | 1973 | 17,047 | | 1972 | 16,474 | | 1971 | 16,694 | | 1970 | 16,993 | | 1969 | 17,275 | | 1968 | 17,737 | | 1967 | 17,956 | | 1966 | 18,937 | | 1965 | 20,943 | | 1964 | 23,458 | | 1963 | 25,214 | | 1962 | 25,910 | | 1961 | 26,273 | | 1960 | 26,194 |
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