Year | Value | 2022 | 52,378 | 2021 | 51,250 | 2020 | 49,948 | 2019 | 48,815 | 2018 | 47,216 | 2017 | 45,445 | 2016 | 44,574 | 2015 | 44,581 | 2014 | 45,587 | 2013 | 47,316 | 2012 | 49,311 | 2011 | 51,076 | 2010 | 52,107 | 2009 | 52,123 | 2008 | 51,117 | 2007 | 49,338 | 2006 | 47,452 | 2005 | 46,094 | 2004 | 45,231 | 2003 | 44,438 | 2002 | 43,596 | 2001 | 42,680 | 2000 | 41,419 | 1999 | 39,772 | 1998 | 38,140 | 1997 | 36,665 | 1996 | 35,122 | 1995 | 33,462 | 1994 | 31,790 | 1993 | 30,151 | 1992 | 28,538 | 1991 | 26,998 | 1990 | 25,587 | 1989 | 24,328 | 1988 | 23,227 | 1987 | 22,301 | 1986 | 21,532 | 1985 | 20,888 | 1984 | 20,426 | 1983 | 20,143 | 1982 | 19,965 | 1981 | 19,861 | 1980 | 19,778 | 1979 | 19,657 | 1978 | 19,506 | 1977 | 19,395 | 1976 | 19,354 | 1975 | 19,382 | 1974 | 19,455 | 1973 | 19,537 | 1972 | 19,626 | 1971 | 19,721 | 1970 | 19,844 | 1969 | 20,022 | 1968 | 20,212 | 1967 | 20,332 | 1966 | 20,358 | 1965 | 20,318 | 1964 | 20,227 | 1963 | 20,116 | 1962 | 19,997 | 1961 | 19,850 | 1960 | 19,615 |
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