Year | Value | 2022 | 38,896 | 2021 | 38,935 | 2020 | 38,838 | 2019 | 38,796 | 2018 | 38,487 | 2017 | 38,133 | 2016 | 38,134 | 2015 | 38,103 | 2014 | 38,020 | 2013 | 37,904 | 2012 | 37,889 | 2011 | 38,184 | 2010 | 38,720 | 2009 | 39,345 | 2008 | 40,056 | 2007 | 40,852 | 2006 | 41,797 | 2005 | 42,936 | 2004 | 44,227 | 2003 | 45,628 | 2002 | 46,815 | 2001 | 47,691 | 2000 | 48,465 | 1999 | 49,112 | 1998 | 49,623 | 1997 | 50,006 | 1996 | 50,263 | 1995 | 50,188 | 1994 | 49,716 | 1993 | 49,001 | 1992 | 48,099 | 1991 | 47,383 | 1990 | 47,105 | 1989 | 47,141 | 1988 | 47,492 | 1987 | 48,192 | 1986 | 49,214 | 1985 | 50,423 | 1984 | 51,719 | 1983 | 53,026 | 1982 | 54,219 | 1981 | 55,244 | 1980 | 55,909 | 1979 | 56,269 | 1978 | 56,607 | 1977 | 56,929 | 1976 | 57,200 | 1975 | 57,464 | 1974 | 57,784 | 1973 | 58,179 | 1972 | 58,692 | 1971 | 59,339 | 1970 | 59,657 | 1969 | 59,545 | 1968 | 59,322 | 1967 | 58,963 | 1966 | 58,461 | 1965 | 57,841 | 1964 | 57,113 | 1963 | 56,292 | 1962 | 55,330 | 1961 | 54,212 | 1960 | 52,980 |
|