Year | Value | 2022 | 49,899 | 2021 | 44,438 | 2020 | 39,068 | 2019 | 33,972 | 2018 | 29,416 | 2017 | 26,482 | 2016 | 25,661 | 2015 | 26,909 | 2014 | 29,700 | 2013 | 33,126 | 2012 | 36,178 | 2011 | 38,174 | 2010 | 39,092 | 2009 | 39,259 | 2008 | 38,976 | 2007 | 38,628 | 2006 | 38,473 | 2005 | 38,445 | 2004 | 38,462 | 2003 | 38,475 | 2002 | 38,187 | 2001 | 37,435 | 2000 | 36,381 | 1999 | 35,808 | 1998 | 35,573 | 1997 | 34,758 | 1996 | 33,664 | 1995 | 32,730 | 1994 | 31,851 | 1993 | 31,209 | 1992 | 31,131 | 1991 | 30,649 | 1990 | 29,624 | 1989 | 28,893 | 1988 | 28,792 | 1987 | 29,488 | 1986 | 30,352 | 1985 | 30,523 | 1984 | 29,974 | 1983 | 29,215 | 1982 | 28,348 | 1981 | 27,516 | 1980 | 26,964 | 1979 | 26,584 | 1978 | 26,341 | 1977 | 26,203 | 1976 | 26,021 | 1975 | 25,742 | 1974 | 25,314 | 1973 | 24,689 | 1972 | 23,845 | 1971 | 22,728 | 1970 | 21,311 | 1969 | 19,707 | 1968 | 17,993 | 1967 | 16,343 | 1966 | 15,051 | 1965 | 14,285 | 1964 | 14,061 | 1963 | 14,452 | 1962 | 15,253 | 1961 | 15,921 | 1960 | 16,134 |
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