Year | Value | 2022 | 39,658 | 2021 | 38,749 | 2020 | 38,446 | 2019 | 38,093 | 2018 | 37,485 | 2017 | 36,956 | 2016 | 36,595 | 2015 | 35,955 | 2014 | 35,360 | 2013 | 35,223 | 2012 | 34,950 | 2011 | 34,307 | 2010 | 33,006 | 2009 | 31,020 | 2008 | 28,980 | 2007 | 27,755 | 2006 | 27,963 | 2005 | 29,259 | 2004 | 31,091 | 2003 | 33,249 | 2002 | 34,999 | 2001 | 35,448 | 2000 | 35,297 | 1999 | 34,581 | 1998 | 33,513 | 1997 | 33,098 | 1996 | 33,185 | 1995 | 33,834 | 1994 | 34,921 | 1993 | 36,131 | 1992 | 37,051 | 1991 | 37,090 | 1990 | 35,876 | 1989 | 34,085 | 1988 | 32,182 | 1987 | 29,706 | 1986 | 27,408 | 1985 | 25,845 | 1984 | 24,394 | 1983 | 23,178 | 1982 | 21,799 | 1981 | 20,291 | 1980 | 19,814 | 1979 | 20,519 | 1978 | 21,451 | 1977 | 22,941 | 1976 | 25,035 | 1975 | 26,341 | 1974 | 26,672 | 1973 | 26,560 | 1972 | 26,331 | 1971 | 26,102 | 1970 | 25,808 | 1969 | 25,581 | 1968 | 25,671 | 1967 | 25,833 | 1966 | 25,522 | 1965 | 24,967 | 1964 | 24,379 | 1963 | 23,533 | 1962 | 22,464 | 1961 | 21,500 | 1960 | 20,705 |
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