Year | Value | 2022 | 15,495 | 2021 | 14,991 | 2020 | 14,632 | 2019 | 14,331 | 2018 | 14,081 | 2017 | 13,957 | 2016 | 13,921 | 2015 | 13,905 | 2014 | 13,966 | 2013 | 14,082 | 2012 | 14,201 | 2011 | 14,237 | 2010 | 14,187 | 2009 | 14,164 | 2008 | 14,222 | 2007 | 14,321 | 2006 | 14,431 | 2005 | 14,509 | 2004 | 14,417 | 2003 | 14,151 | 2002 | 13,908 | 2001 | 13,780 | 2000 | 13,742 | 1999 | 13,798 | 1998 | 13,948 | 1997 | 14,095 | 1996 | 14,078 | 1995 | 13,900 | 1994 | 13,587 | 1993 | 13,082 | 1992 | 12,468 | 1991 | 11,905 | 1990 | 11,325 | 1989 | 10,730 | 1988 | 10,206 | 1987 | 9,664 | 1986 | 9,047 | 1985 | 8,440 | 1984 | 7,945 | 1983 | 7,572 | 1982 | 7,336 | 1981 | 7,247 | 1980 | 7,248 | 1979 | 7,291 | 1978 | 7,355 | 1977 | 7,421 | 1976 | 7,476 | 1975 | 7,488 | 1974 | 7,434 | 1973 | 7,310 | 1972 | 7,111 | 1971 | 6,815 | 1970 | 6,428 | 1969 | 6,026 | 1968 | 5,669 | 1967 | 5,350 | 1966 | 5,068 | 1965 | 4,820 | 1964 | 4,596 | 1963 | 4,341 | 1962 | 4,045 | 1961 | 3,760 | 1960 | 3,491 |
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