| Year | Value | | 2022 | 122,998 | | 2021 | 118,623 | | 2020 | 113,982 | | 2019 | 109,017 | | 2018 | 103,657 | | 2017 | 98,633 | | 2016 | 94,417 | | 2015 | 90,670 | | 2014 | 87,165 | | 2013 | 83,796 | | 2012 | 80,678 | | 2011 | 78,048 | | 2010 | 76,095 | | 2009 | 74,987 | | 2008 | 74,866 | | 2007 | 75,636 | | 2006 | 76,676 | | 2005 | 77,411 | | 2004 | 77,753 | | 2003 | 77,640 | | 2002 | 76,710 | | 2001 | 74,913 | | 2000 | 72,505 | | 1999 | 69,579 | | 1998 | 66,239 | | 1997 | 62,714 | | 1996 | 59,321 | | 1995 | 56,138 | | 1994 | 53,094 | | 1993 | 50,077 | | 1992 | 47,171 | | 1991 | 44,539 | | 1990 | 42,260 | | 1989 | 40,329 | | 1988 | 38,630 | | 1987 | 37,067 | | 1986 | 35,628 | | 1985 | 34,323 | | 1984 | 33,060 | | 1983 | 31,694 | | 1982 | 30,284 | | 1981 | 29,006 | | 1980 | 27,853 | | 1979 | 26,788 | | 1978 | 25,884 | | 1977 | 25,161 | | 1976 | 24,639 | | 1975 | 24,169 | | 1974 | 23,614 | | 1973 | 22,967 | | 1972 | 22,226 | | 1971 | 21,415 | | 1970 | 20,508 | | 1969 | 19,582 | | 1968 | 18,697 | | 1967 | 17,844 | | 1966 | 17,072 | | 1965 | 16,460 | | 1964 | 16,017 | | 1963 | 15,690 | | 1962 | 15,416 | | 1961 | 15,146 | | 1960 | 14,806 |
|