Year | Value | 2022 | 48,490 | 2021 | 49,183 | 2020 | 49,691 | 2019 | 49,312 | 2018 | 48,469 | 2017 | 47,696 | 2016 | 46,923 | 2015 | 46,145 | 2014 | 45,370 | 2013 | 44,573 | 2012 | 43,742 | 2011 | 42,895 | 2010 | 42,053 | 2009 | 41,218 | 2008 | 40,381 | 2007 | 39,603 | 2006 | 38,980 | 2005 | 38,587 | 2004 | 38,470 | 2003 | 38,662 | 2002 | 39,192 | 2001 | 40,092 | 2000 | 39,880 | 1999 | 38,313 | 1998 | 36,584 | 1997 | 34,595 | 1996 | 32,252 | 1995 | 29,430 | 1994 | 26,037 | 1993 | 22,041 | 1992 | 19,593 | 1991 | 18,999 | 1990 | 18,452 | 1989 | 17,951 | 1988 | 17,479 | 1987 | 17,049 | 1986 | 16,654 | 1985 | 16,289 | 1984 | 15,962 | 1983 | 15,678 | 1982 | 15,434 | 1981 | 15,235 | 1980 | 15,087 | 1979 | 14,991 | 1978 | 14,955 | 1977 | 14,961 | 1976 | 14,976 | 1975 | 14,981 | 1974 | 14,975 | 1973 | 14,953 | 1972 | 14,906 | 1971 | 14,845 | 1970 | 14,779 | 1969 | 14,700 | 1968 | 14,592 | 1967 | 14,462 | 1966 | 14,326 | 1965 | 14,198 | 1964 | 14,085 | 1963 | 13,984 | 1962 | 13,905 | 1961 | 13,863 | 1960 | 13,867 |
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