Year | Value | 2022 | 28,682 | 2021 | 29,493 | 2020 | 30,442 | 2019 | 31,389 | 2018 | 32,437 | 2017 | 33,325 | 2016 | 34,080 | 2015 | 34,618 | 2014 | 34,445 | 2013 | 33,552 | 2012 | 32,268 | 2011 | 30,120 | 2010 | 27,202 | 2009 | 24,733 | 2008 | 22,874 | 2007 | 21,200 | 2006 | 19,987 | 2005 | 19,243 | 2004 | 18,623 | 2003 | 18,248 | 2002 | 18,247 | 2001 | 18,445 | 2000 | 18,831 | 1999 | 19,380 | 1998 | 19,908 | 1997 | 20,208 | 1996 | 20,238 | 1995 | 20,226 | 1994 | 20,401 | 1993 | 21,018 | 1992 | 21,996 | 1991 | 22,584 | 1990 | 22,399 | 1989 | 21,791 | 1988 | 20,983 | 1987 | 20,090 | 1986 | 19,238 | 1985 | 18,331 | 1984 | 17,246 | 1983 | 15,976 | 1982 | 14,633 | 1981 | 13,446 | 1980 | 12,750 | 1979 | 12,319 | 1978 | 11,685 | 1977 | 10,826 | 1976 | 9,787 | 1975 | 8,664 | 1974 | 7,569 | 1973 | 6,585 | 1972 | 5,781 | 1971 | 5,211 | 1970 | 4,921 | 1969 | 4,843 | 1968 | 4,878 | 1967 | 4,998 | 1966 | 5,154 | 1965 | 5,293 | 1964 | 5,424 | 1963 | 5,479 | 1962 | 5,439 | 1961 | 5,341 | 1960 | 5,559 |
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