| Year | Value | | 2022 | 2,638 | | 2021 | 2,575 | | 2020 | 2,511 | | 2019 | 2,434 | | 2018 | 2,343 | | 2017 | 2,242 | | 2016 | 2,140 | | 2015 | 2,038 | | 2014 | 1,933 | | 2013 | 1,834 | | 2012 | 1,747 | | 2011 | 1,674 | | 2010 | 1,607 | | 2009 | 1,549 | | 2008 | 1,502 | | 2007 | 1,456 | | 2006 | 1,413 | | 2005 | 1,387 | | 2004 | 1,382 | | 2003 | 1,387 | | 2002 | 1,402 | | 2001 | 1,418 | | 2000 | 1,423 | | 1999 | 1,422 | | 1998 | 1,421 | | 1997 | 1,422 | | 1996 | 1,427 | | 1995 | 1,433 | | 1994 | 1,439 | | 1993 | 1,442 | | 1992 | 1,446 | | 1991 | 1,453 | | 1990 | 1,456 | | 1989 | 1,454 | | 1988 | 1,454 | | 1987 | 1,449 | | 1986 | 1,437 | | 1985 | 1,424 | | 1984 | 1,414 | | 1983 | 1,411 | | 1982 | 1,414 | | 1981 | 1,424 | | 1980 | 1,429 | | 1979 | 1,424 | | 1978 | 1,416 | | 1977 | 1,405 | | 1976 | 1,391 | | 1975 | 1,375 | | 1974 | 1,357 | | 1973 | 1,338 | | 1972 | 1,319 | | 1971 | 1,299 | | 1970 | 1,278 | | 1969 | 1,258 | | 1968 | 1,238 | | 1967 | 1,217 | | 1966 | 1,199 | | 1965 | 1,179 | | 1964 | 1,161 | | 1963 | 1,140 | | 1962 | 1,118 | | 1961 | 1,094 | | 1960 | 1,068 |
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