| Year | Value | | 2022 | 5,337 | | 2021 | 5,287 | | 2020 | 5,201 | | 2019 | 5,085 | | 2018 | 4,953 | | 2017 | 4,811 | | 2016 | 4,658 | | 2015 | 4,504 | | 2014 | 4,355 | | 2013 | 4,209 | | 2012 | 4,076 | | 2011 | 3,967 | | 2010 | 3,881 | | 2009 | 3,842 | | 2008 | 3,827 | | 2007 | 3,786 | | 2006 | 3,701 | | 2005 | 3,558 | | 2004 | 3,361 | | 2003 | 3,137 | | 2002 | 2,921 | | 2001 | 2,753 | | 2000 | 2,653 | | 1999 | 2,599 | | 1998 | 2,564 | | 1997 | 2,535 | | 1996 | 2,487 | | 1995 | 2,411 | | 1994 | 2,318 | | 1993 | 2,234 | | 1992 | 2,173 | | 1991 | 2,134 | | 1990 | 2,113 | | 1989 | 2,090 | | 1988 | 2,069 | | 1987 | 2,072 | | 1986 | 2,096 | | 1985 | 2,116 | | 1984 | 2,123 | | 1983 | 2,070 | | 1982 | 1,943 | | 1981 | 1,798 | | 1980 | 1,666 | | 1979 | 1,565 | | 1978 | 1,487 | | 1977 | 1,399 | | 1976 | 1,303 | | 1975 | 1,216 | | 1974 | 1,145 | | 1973 | 1,097 | | 1972 | 1,070 | | 1971 | 1,045 | | 1970 | 1,025 | | 1969 | 1,030 | | 1968 | 1,040 | | 1967 | 1,028 | | 1966 | 1,003 | | 1965 | 974 | | 1964 | 950 | | 1963 | 932 | | 1962 | 919 | | 1961 | 907 | | 1960 | 889 |
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