Year | Value | 2022 | 30,710 | 2021 | 30,428 | 2020 | 30,620 | 2019 | 31,171 | 2018 | 32,052 | 2017 | 33,416 | 2016 | 35,321 | 2015 | 37,164 | 2014 | 39,661 | 2013 | 42,943 | 2012 | 45,650 | 2011 | 47,531 | 2010 | 48,560 | 2009 | 48,752 | 2008 | 48,590 | 2007 | 48,274 | 2006 | 48,107 | 2005 | 48,206 | 2004 | 48,105 | 2003 | 47,715 | 2002 | 47,494 | 2001 | 47,591 | 2000 | 47,728 | 1999 | 47,025 | 1998 | 46,400 | 1997 | 46,777 | 1996 | 47,506 | 1995 | 48,531 | 1994 | 49,680 | 1993 | 50,755 | 1992 | 51,329 | 1991 | 51,132 | 1990 | 50,698 | 1989 | 50,646 | 1988 | 51,144 | 1987 | 52,146 | 1986 | 53,432 | 1985 | 54,502 | 1984 | 54,964 | 1983 | 55,108 | 1982 | 54,948 | 1981 | 54,478 | 1980 | 54,453 | 1979 | 55,011 | 1978 | 55,274 | 1977 | 55,224 | 1976 | 54,997 | 1975 | 53,940 | 1974 | 52,810 | 1973 | 52,295 | 1972 | 51,593 | 1971 | 50,409 | 1970 | 48,524 | 1969 | 45,905 | 1968 | 43,166 | 1967 | 41,476 | 1966 | 41,862 | 1965 | 43,374 | 1964 | 45,299 | 1963 | 47,654 | 1962 | 49,510 | 1961 | 49,943 | 1960 | 49,762 |
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