Year | Value | 2022 | 42,516 | 2021 | 43,777 | 2020 | 45,359 | 2019 | 47,082 | 2018 | 48,591 | 2017 | 49,587 | 2016 | 49,823 | 2015 | 49,333 | 2014 | 48,272 | 2013 | 46,874 | 2012 | 45,368 | 2011 | 44,029 | 2010 | 43,130 | 2009 | 42,682 | 2008 | 42,782 | 2007 | 43,481 | 2006 | 44,712 | 2005 | 46,318 | 2004 | 47,978 | 2003 | 49,405 | 2002 | 50,303 | 2001 | 50,541 | 2000 | 50,019 | 1999 | 48,957 | 1998 | 47,573 | 1997 | 46,300 | 1996 | 45,090 | 1995 | 44,033 | 1994 | 42,984 | 1993 | 41,766 | 1992 | 40,791 | 1991 | 39,870 | 1990 | 39,140 | 1989 | 38,450 | 1988 | 37,319 | 1987 | 35,701 | 1986 | 33,642 | 1985 | 31,501 | 1984 | 29,659 | 1983 | 28,044 | 1982 | 26,600 | 1981 | 25,279 | 1980 | 24,089 | 1979 | 22,975 | 1978 | 22,091 | 1977 | 21,668 | 1976 | 21,447 | 1975 | 21,322 | 1974 | 21,159 | 1973 | 20,860 | 1972 | 20,413 | 1971 | 19,903 | 1970 | 19,412 | 1969 | 19,044 | 1968 | 18,906 | 1967 | 19,021 | 1966 | 19,326 | 1965 | 19,702 | 1964 | 19,977 | 1963 | 19,980 | 1962 | 19,590 | 1961 | 18,825 | 1960 | 18,375 |
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