Year | Value | 2022 | 36,574 | 2021 | 36,849 | 2020 | 37,120 | 2019 | 37,454 | 2018 | 37,828 | 2017 | 38,094 | 2016 | 38,210 | 2015 | 38,323 | 2014 | 38,615 | 2013 | 38,982 | 2012 | 39,322 | 2011 | 39,661 | 2010 | 39,878 | 2009 | 39,814 | 2008 | 39,486 | 2007 | 38,869 | 2006 | 37,946 | 2005 | 36,736 | 2004 | 35,251 | 2003 | 33,693 | 2002 | 32,338 | 2001 | 31,317 | 2000 | 30,669 | 1999 | 30,433 | 1998 | 30,466 | 1997 | 30,537 | 1996 | 30,737 | 1995 | 31,261 | 1994 | 31,996 | 1993 | 32,767 | 1992 | 33,539 | 1991 | 34,136 | 1990 | 34,375 | 1989 | 34,342 | 1988 | 34,133 | 1987 | 33,693 | 1986 | 33,233 | 1985 | 32,583 | 1984 | 31,495 | 1983 | 30,200 | 1982 | 28,825 | 1981 | 27,381 | 1980 | 25,877 | 1979 | 24,636 | 1978 | 23,759 | 1977 | 23,068 | 1976 | 22,551 | 1975 | 22,170 | 1974 | 21,614 | 1973 | 20,866 | 1972 | 20,216 | 1971 | 19,674 | 1970 | 19,238 | 1969 | 18,910 | 1968 | 18,594 | 1967 | 18,180 | 1966 | 17,663 | 1965 | 17,080 | 1964 | 16,446 | 1963 | 15,793 | 1962 | 15,141 | 1961 | 14,516 | 1960 | 13,927 |
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