Year | Value | 2022 | 32,422 | 2021 | 31,670 | 2020 | 32,268 | 2019 | 32,965 | 2018 | 32,493 | 2017 | 31,621 | 2016 | 30,874 | 2015 | 30,206 | 2014 | 29,462 | 2013 | 28,762 | 2012 | 28,138 | 2011 | 27,411 | 2010 | 26,843 | 2009 | 26,304 | 2008 | 25,519 | 2007 | 24,828 | 2006 | 23,731 | 2005 | 22,256 | 2004 | 20,787 | 2003 | 19,606 | 2002 | 18,546 | 2001 | 17,630 | 2000 | 16,868 | 1999 | 16,035 | 1998 | 14,789 | 1997 | 13,209 | 1996 | 11,673 | 1995 | 10,517 | 1994 | 10,273 | 1993 | 11,263 | 1992 | 13,062 | 1991 | 14,967 | 1990 | 16,539 | 1989 | 17,340 | 1988 | 17,499 | 1987 | 17,417 | 1986 | 17,083 | 1985 | 16,682 | 1984 | 16,277 | 1983 | 15,933 | 1982 | 15,739 | 1981 | 15,706 | 1980 | 15,755 | 1979 | 15,685 | 1978 | 15,411 | 1977 | 14,903 | 1976 | 14,108 | 1975 | 13,076 | 1974 | 12,173 | 1973 | 11,510 | 1972 | 10,951 | 1971 | 10,486 | 1970 | 10,066 | 1969 | 9,696 | 1968 | 9,455 | 1967 | 9,256 | 1966 | 9,045 | 1965 | 8,889 | 1964 | 8,826 | 1963 | 8,778 | 1962 | 8,682 | 1961 | 8,569 | 1960 | 8,498 |
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