Year | Value | 2022 | 36,469 | 2021 | 36,686 | 2020 | 36,922 | 2019 | 37,034 | 2018 | 37,029 | 2017 | 37,044 | 2016 | 37,071 | 2015 | 36,760 | 2014 | 36,110 | 2013 | 35,425 | 2012 | 34,700 | 2011 | 33,945 | 2010 | 33,178 | 2009 | 32,401 | 2008 | 31,862 | 2007 | 31,823 | 2006 | 32,011 | 2005 | 32,141 | 2004 | 32,236 | 2003 | 32,316 | 2002 | 32,386 | 2001 | 32,444 | 2000 | 32,465 | 1999 | 32,394 | 1998 | 32,209 | 1997 | 31,968 | 1996 | 31,719 | 1995 | 31,482 | 1994 | 31,253 | 1993 | 31,024 | 1992 | 30,794 | 1991 | 30,564 | 1990 | 30,329 | 1989 | 30,078 | 1988 | 29,802 | 1987 | 29,500 | 1986 | 29,171 | 1985 | 28,807 | 1984 | 28,407 | 1983 | 27,985 | 1982 | 27,573 | 1981 | 27,284 | 1980 | 27,076 | 1979 | 26,834 | 1978 | 26,553 | 1977 | 26,242 | 1976 | 25,898 | 1975 | 25,524 | 1974 | 25,262 | 1973 | 25,102 | 1972 | 24,889 | 1971 | 24,610 | 1970 | 24,270 | 1969 | 23,875 | 1968 | 23,481 | 1967 | 23,281 | 1966 | 23,198 | 1965 | 23,022 | 1964 | 22,766 | 1963 | 22,442 | 1962 | 22,106 | 1961 | 21,907 | 1960 | 21,797 |
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