| Year | Value | | 2022 | 5,302 | | 2021 | 5,235 | | 2020 | 5,122 | | 2019 | 4,993 | | 2018 | 4,839 | | 2017 | 4,648 | | 2016 | 4,497 | | 2015 | 4,389 | | 2014 | 4,294 | | 2013 | 4,264 | | 2012 | 4,253 | | 2011 | 4,193 | | 2010 | 4,124 | | 2009 | 4,139 | | 2008 | 4,206 | | 2007 | 4,269 | | 2006 | 4,337 | | 2005 | 4,329 | | 2004 | 4,259 | | 2003 | 4,178 | | 2002 | 4,096 | | 2001 | 4,002 | | 2000 | 3,928 | | 1999 | 3,894 | | 1998 | 3,840 | | 1997 | 3,754 | | 1996 | 3,692 | | 1995 | 3,672 | | 1994 | 3,730 | | 1993 | 3,837 | | 1992 | 3,884 | | 1991 | 3,848 | | 1990 | 3,781 | | 1989 | 3,721 | | 1988 | 3,664 | | 1987 | 3,580 | | 1986 | 3,468 | | 1985 | 3,358 | | 1984 | 3,248 | | 1983 | 3,136 | | 1982 | 3,026 | | 1981 | 2,921 | | 1980 | 2,821 | | 1979 | 2,693 | | 1978 | 2,537 | | 1977 | 2,388 | | 1976 | 2,242 | | 1975 | 2,109 | | 1974 | 2,036 | | 1973 | 2,018 | | 1972 | 2,005 | | 1971 | 1,994 | | 1970 | 1,971 | | 1969 | 1,935 | | 1968 | 1,901 | | 1967 | 1,870 | | 1966 | 1,835 | | 1965 | 1,799 | | 1964 | 1,763 | | 1963 | 1,726 | | 1962 | 1,677 | | 1961 | 1,619 | | 1960 | 1,563 |
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