| Year | Value | | 2022 | 55,654 | | 2021 | 53,456 | | 2020 | 51,319 | | 2019 | 49,164 | | 2018 | 47,210 | | 2017 | 45,491 | | 2016 | 43,915 | | 2015 | 42,440 | | 2014 | 41,083 | | 2013 | 39,706 | | 2012 | 38,278 | | 2011 | 36,896 | | 2010 | 35,617 | | 2009 | 34,417 | | 2008 | 33,265 | | 2007 | 32,157 | | 2006 | 31,012 | | 2005 | 29,799 | | 2004 | 28,545 | | 2003 | 27,250 | | 2002 | 25,923 | | 2001 | 24,634 | | 2000 | 23,410 | | 1999 | 22,232 | | 1998 | 21,110 | | 1997 | 20,043 | | 1996 | 19,076 | | 1995 | 18,248 | | 1994 | 17,534 | | 1993 | 16,940 | | 1992 | 16,434 | | 1991 | 15,921 | | 1990 | 15,341 | | 1989 | 14,718 | | 1988 | 14,072 | | 1987 | 13,410 | | 1986 | 12,770 | | 1985 | 12,167 | | 1984 | 11,572 | | 1983 | 10,969 | | 1982 | 10,364 | | 1981 | 9,768 | | 1980 | 9,186 | | 1979 | 8,621 | | 1978 | 8,078 | | 1977 | 7,568 | | 1976 | 7,118 | | 1975 | 6,727 | | 1974 | 6,377 | | 1973 | 6,060 | | 1972 | 5,776 | | 1971 | 5,519 | | 1970 | 5,286 | | 1969 | 5,079 | | 1968 | 4,905 | | 1967 | 4,764 | | 1966 | 4,639 | | 1965 | 4,513 | | 1964 | 4,388 | | 1963 | 4,258 | | 1962 | 4,110 | | 1961 | 3,947 | | 1960 | 3,773 |
|