| Year | Value | | 2022 | 129,918 | | 2021 | 133,109 | | 2020 | 137,947 | | 2019 | 142,198 | | 2018 | 144,712 | | 2017 | 144,863 | | 2016 | 143,512 | | 2015 | 141,412 | | 2014 | 139,249 | | 2013 | 137,617 | | 2012 | 136,185 | | 2011 | 134,397 | | 2010 | 132,017 | | 2009 | 128,639 | | 2008 | 125,161 | | 2007 | 122,116 | | 2006 | 120,692 | | 2005 | 120,315 | | 2004 | 120,868 | | 2003 | 122,664 | | 2002 | 125,828 | | 2001 | 130,116 | | 2000 | 135,972 | | 1999 | 143,211 | | 1998 | 151,723 | | 1997 | 162,238 | | 1996 | 175,913 | | 1995 | 192,064 | | 1994 | 208,204 | | 1993 | 217,405 | | 1992 | 219,519 | | 1991 | 219,611 | | 1990 | 217,479 | | 1989 | 217,159 | | 1988 | 217,199 | | 1987 | 214,924 | | 1986 | 212,886 | | 1985 | 211,583 | | 1984 | 210,833 | | 1983 | 209,893 | | 1982 | 207,328 | | 1981 | 203,876 | | 1980 | 200,912 | | 1979 | 198,106 | | 1978 | 195,939 | | 1977 | 194,955 | | 1976 | 194,279 | | 1975 | 193,353 | | 1974 | 192,756 | | 1973 | 192,967 | | 1972 | 193,820 | | 1971 | 195,030 | | 1970 | 198,022 | | 1969 | 203,013 | | 1968 | 208,047 | | 1967 | 212,201 | | 1966 | 215,634 | | 1965 | 219,621 | | 1964 | 222,754 | | 1963 | 222,805 | | 1962 | 220,540 | | 1961 | 216,483 | | 1960 | 210,760 |
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