| Year | Value | | 2022 | 138,263 | | 2021 | 138,252 | | 2020 | 138,158 | | 2019 | 138,032 | | 2018 | 138,014 | | 2017 | 137,731 | | 2016 | 136,990 | | 2015 | 135,786 | | 2014 | 134,408 | | 2013 | 133,184 | | 2012 | 132,307 | | 2011 | 131,431 | | 2010 | 130,533 | | 2009 | 129,847 | | 2008 | 129,091 | | 2007 | 128,935 | | 2006 | 128,947 | | 2005 | 128,987 | | 2004 | 129,643 | | 2003 | 130,360 | | 2002 | 131,253 | | 2001 | 132,552 | | 2000 | 133,966 | | 1999 | 135,223 | | 1998 | 136,284 | | 1997 | 137,264 | | 1996 | 138,315 | | 1995 | 139,504 | | 1994 | 140,792 | | 1993 | 141,998 | | 1992 | 142,725 | | 1991 | 142,655 | | 1990 | 141,972 | | 1989 | 140,885 | | 1988 | 139,279 | | 1987 | 137,212 | | 1986 | 134,820 | | 1985 | 132,314 | | 1984 | 129,752 | | 1983 | 127,069 | | 1982 | 124,364 | | 1981 | 121,553 | | 1980 | 118,399 | | 1979 | 114,771 | | 1978 | 110,700 | | 1977 | 106,328 | | 1976 | 101,979 | | 1975 | 97,943 | | 1974 | 94,356 | | 1973 | 91,301 | | 1972 | 88,626 | | 1971 | 86,122 | | 1970 | 83,917 | | 1969 | 82,102 | | 1968 | 80,558 | | 1967 | 79,245 | | 1966 | 77,588 | | 1965 | 75,594 | | 1964 | 73,749 | | 1963 | 71,910 | | 1962 | 69,990 | | 1961 | 68,004 | | 1960 | 65,928 |
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