| Year | Value | | 2022 | 44,450 | | 2021 | 42,207 | | 2020 | 40,175 | | 2019 | 38,180 | | 2018 | 36,575 | | 2017 | 35,329 | | 2016 | 34,063 | | 2015 | 32,717 | | 2014 | 31,401 | | 2013 | 30,162 | | 2012 | 28,985 | | 2011 | 27,865 | | 2010 | 26,834 | | 2009 | 25,863 | | 2008 | 24,879 | | 2007 | 23,885 | | 2006 | 22,873 | | 2005 | 21,823 | | 2004 | 20,752 | | 2003 | 19,691 | | 2002 | 18,672 | | 2001 | 17,709 | | 2000 | 16,783 | | 1999 | 15,879 | | 1998 | 15,010 | | 1997 | 14,146 | | 1996 | 13,251 | | 1995 | 12,320 | | 1994 | 11,347 | | 1993 | 10,337 | | 1992 | 9,297 | | 1991 | 8,208 | | 1990 | 6,970 | | 1989 | 5,875 | | 1988 | 5,115 | | 1987 | 4,456 | | 1986 | 3,856 | | 1985 | 3,346 | | 1984 | 2,941 | | 1983 | 2,638 | | 1982 | 2,425 | | 1981 | 2,293 | | 1980 | 2,082 | | 1979 | 1,806 | | 1978 | 1,619 | | 1977 | 1,508 | | 1976 | 1,430 | | 1975 | 1,333 | | 1974 | 1,219 | | 1973 | 1,111 | | 1972 | 1,015 | | 1971 | 984 | | 1970 | 1,088 | | 1969 | 1,297 | | 1968 | 1,553 | | 1967 | 1,830 | | 1966 | 2,085 | | 1965 | 2,296 | | 1964 | 2,472 | | 1963 | 2,603 | | 1962 | 2,682 | | 1961 | 2,719 | | 1960 | 2,701 |
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