| Year | Value | | 2022 | 2,957 | | 2021 | 2,989 | | 2020 | 3,005 | | 2019 | 2,989 | | 2018 | 2,958 | | 2017 | 2,896 | | 2016 | 2,825 | | 2015 | 2,779 | | 2014 | 2,765 | | 2013 | 2,787 | | 2012 | 2,834 | | 2011 | 2,871 | | 2010 | 2,883 | | 2009 | 2,866 | | 2008 | 2,811 | | 2007 | 2,725 | | 2006 | 2,629 | | 2005 | 2,535 | | 2004 | 2,456 | | 2003 | 2,312 | | 2002 | 2,103 | | 2001 | 1,917 | | 2000 | 1,740 | | 1999 | 1,567 | | 1998 | 1,405 | | 1997 | 1,254 | | 1996 | 1,122 | | 1995 | 1,023 | | 1994 | 976 | | 1993 | 978 | | 1992 | 1,003 | | 1991 | 1,037 | | 1990 | 1,075 | | 1989 | 1,104 | | 1988 | 1,123 | | 1987 | 1,137 | | 1986 | 1,148 | | 1985 | 1,158 | | 1984 | 1,172 | | 1983 | 1,196 | | 1982 | 1,235 | | 1981 | 1,293 | | 1980 | 1,373 | | 1979 | 1,429 | | 1978 | 1,455 | | 1977 | 1,490 | | 1976 | 1,528 | | 1975 | 1,561 | | 1974 | 1,584 | | 1973 | 1,595 | | 1972 | 1,593 | | 1971 | 1,569 | | 1970 | 1,524 | | 1969 | 1,473 | | 1968 | 1,433 | | 1967 | 1,412 | | 1966 | 1,413 | | 1965 | 1,432 | | 1964 | 1,415 | | 1963 | 1,250 | | 1962 | 993 | | 1961 | 833 | | 1960 | 759 |
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