Year | Value | 2022 | 39,401 | 2021 | 39,062 | 2020 | 38,561 | 2019 | 37,924 | 2018 | 37,269 | 2017 | 36,730 | 2016 | 36,404 | 2015 | 36,296 | 2014 | 36,313 | 2013 | 36,322 | 2012 | 36,175 | 2011 | 35,732 | 2010 | 34,923 | 2009 | 33,828 | 2008 | 32,611 | 2007 | 31,417 | 2006 | 30,373 | 2005 | 29,529 | 2004 | 28,849 | 2003 | 28,277 | 2002 | 27,759 | 2001 | 27,235 | 2000 | 26,634 | 1999 | 25,919 | 1998 | 25,087 | 1997 | 24,145 | 1996 | 23,112 | 1995 | 22,043 | 1994 | 21,014 | 1993 | 20,087 | 1992 | 19,351 | 1991 | 18,789 | 1990 | 18,304 | 1989 | 17,852 | 1988 | 17,416 | 1987 | 16,992 | 1986 | 16,585 | 1985 | 16,210 | 1984 | 15,877 | 1983 | 15,581 | 1982 | 15,278 | 1981 | 14,931 | 1980 | 14,592 | 1979 | 14,323 | 1978 | 14,130 | 1977 | 13,999 | 1976 | 13,923 | 1975 | 13,910 | 1974 | 14,054 | 1973 | 14,146 | 1972 | 14,053 | 1971 | 13,943 | 1970 | 13,843 | 1969 | 13,763 | 1968 | 13,708 | 1967 | 13,678 | 1966 | 13,668 | 1965 | 13,683 | 1964 | 13,719 | 1963 | 13,727 | 1962 | 13,649 | 1961 | 13,450 | 1960 | 13,080 |
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