| Year | Value | | 2022 | 2,911 | | 2021 | 2,843 | | 2020 | 2,811 | | 2019 | 2,825 | | 2018 | 2,878 | | 2017 | 2,947 | | 2016 | 3,011 | | 2015 | 3,058 | | 2014 | 3,071 | | 2013 | 3,046 | | 2012 | 2,992 | | 2011 | 2,917 | | 2010 | 2,807 | | 2009 | 2,682 | | 2008 | 2,566 | | 2007 | 2,451 | | 2006 | 2,335 | | 2005 | 2,230 | | 2004 | 2,139 | | 2003 | 2,045 | | 2002 | 1,960 | | 2001 | 1,896 | | 2000 | 1,834 | | 1999 | 1,768 | | 1998 | 1,703 | | 1997 | 1,634 | | 1996 | 1,563 | | 1995 | 1,501 | | 1994 | 1,454 | | 1993 | 1,421 | | 1992 | 1,407 | | 1991 | 1,406 | | 1990 | 1,398 | | 1989 | 1,376 | | 1988 | 1,349 | | 1987 | 1,314 | | 1986 | 1,270 | | 1985 | 1,227 | | 1984 | 1,192 | | 1983 | 1,164 | | 1982 | 1,148 | | 1981 | 1,141 | | 1980 | 1,142 | | 1979 | 1,151 | | 1978 | 1,177 | | 1977 | 1,203 | | 1976 | 1,216 | | 1975 | 1,223 | | 1974 | 1,226 | | 1973 | 1,203 | | 1972 | 1,158 | | 1971 | 1,121 | | 1970 | 1,094 | | 1969 | 1,074 | | 1968 | 1,062 | | 1967 | 1,052 | | 1966 | 1,033 | | 1965 | 1,019 | | 1964 | 1,012 | | 1963 | 1,007 | | 1962 | 1,003 | | 1961 | 997 | | 1960 | 991 |
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