Year | Value | 2022 | 43,492 | 2021 | 44,096 | 2020 | 45,425 | 2019 | 46,482 | 2018 | 47,206 | 2017 | 47,668 | 2016 | 47,812 | 2015 | 48,050 | 2014 | 48,288 | 2013 | 48,270 | 2012 | 48,276 | 2011 | 48,421 | 2010 | 48,249 | 2009 | 48,181 | 2008 | 48,496 | 2007 | 48,499 | 2006 | 47,919 | 2005 | 46,367 | 2004 | 43,787 | 2003 | 41,047 | 2002 | 39,395 | 2001 | 39,842 | 2000 | 41,880 | 1999 | 44,034 | 1998 | 46,736 | 1997 | 49,704 | 1996 | 50,704 | 1995 | 50,696 | 1994 | 50,407 | 1993 | 49,435 | 1992 | 48,917 | 1991 | 49,125 | 1990 | 49,979 | 1989 | 51,411 | 1988 | 53,162 | 1987 | 54,032 | 1986 | 54,027 | 1985 | 53,850 | 1984 | 53,490 | 1983 | 52,938 | 1982 | 52,112 | 1981 | 50,868 | 1980 | 48,511 | 1979 | 45,363 | 1978 | 42,207 | 1977 | 38,515 | 1976 | 34,957 | 1975 | 33,593 | 1974 | 34,578 | 1973 | 36,324 | 1972 | 38,998 | 1971 | 42,268 | 1970 | 44,540 | 1969 | 45,490 | 1968 | 45,498 | 1967 | 45,303 | 1966 | 45,169 | 1965 | 44,581 | 1964 | 43,722 | 1963 | 43,229 | 1962 | 42,899 | 1961 | 42,288 | 1960 | 42,223 |
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