Year | Value | 2022 | 49,683 | 2021 | 47,012 | 2020 | 44,270 | 2019 | 40,701 | 2018 | 37,452 | 2017 | 34,596 | 2016 | 31,713 | 2015 | 29,146 | 2014 | 27,152 | 2013 | 25,356 | 2012 | 23,914 | 2011 | 22,748 | 2010 | 21,931 | 2009 | 21,396 | 2008 | 21,133 | 2007 | 21,236 | 2006 | 21,756 | 2005 | 22,638 | 2004 | 23,534 | 2003 | 24,025 | 2002 | 24,013 | 2001 | 23,452 | 2000 | 22,343 | 1999 | 21,323 | 1998 | 20,914 | 1997 | 20,880 | 1996 | 20,945 | 1995 | 20,945 | 1994 | 20,704 | 1993 | 20,156 | 1992 | 19,412 | 1991 | 18,679 | 1990 | 18,162 | 1989 | 17,911 | 1988 | 17,869 | 1987 | 18,012 | 1986 | 18,209 | 1985 | 18,351 | 1984 | 18,443 | 1983 | 18,404 | 1982 | 18,168 | 1981 | 17,815 | 1980 | 17,423 | 1979 | 17,092 | 1978 | 16,942 | 1977 | 16,969 | 1976 | 17,091 | 1975 | 17,247 | 1974 | 17,406 | 1973 | 17,522 | 1972 | 17,603 | 1971 | 17,661 | 1970 | 17,684 | 1969 | 17,725 | 1968 | 17,689 | 1967 | 17,622 | 1966 | 17,674 | 1965 | 17,742 | 1964 | 17,720 | 1963 | 17,590 | 1962 | 17,083 | 1961 | 16,192 | 1960 | 15,262 |
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