Year | Value | 2022 | 42,740 | 2021 | 41,439 | 2020 | 39,925 | 2019 | 37,508 | 2018 | 34,932 | 2017 | 33,345 | 2016 | 33,533 | 2015 | 35,061 | 2014 | 37,225 | 2013 | 39,837 | 2012 | 42,017 | 2011 | 42,436 | 2010 | 41,925 | 2009 | 41,078 | 2008 | 39,652 | 2007 | 38,570 | 2006 | 38,154 | 2005 | 38,338 | 2004 | 39,044 | 2003 | 40,178 | 2002 | 40,714 | 2001 | 40,609 | 2000 | 40,479 | 1999 | 39,751 | 1998 | 38,915 | 1997 | 38,374 | 1996 | 37,539 | 1995 | 36,002 | 1994 | 33,859 | 1993 | 31,716 | 1992 | 29,369 | 1991 | 26,959 | 1990 | 25,984 | 1989 | 26,865 | 1988 | 28,351 | 1987 | 30,561 | 1986 | 33,317 | 1985 | 35,398 | 1984 | 36,312 | 1983 | 36,463 | 1982 | 36,323 | 1981 | 35,944 | 1980 | 35,393 | 1979 | 34,929 | 1978 | 34,761 | 1977 | 34,579 | 1976 | 34,289 | 1975 | 34,220 | 1974 | 34,024 | 1973 | 33,424 | 1972 | 32,629 | 1971 | 31,768 | 1970 | 30,797 | 1969 | 29,739 | 1968 | 28,886 | 1967 | 28,376 | 1966 | 28,037 | 1965 | 27,496 | 1964 | 27,050 | 1963 | 26,758 | 1962 | 26,185 | 1961 | 25,618 | 1960 | 25,332 |
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