| Year | Value | | 2022 | 218,534 | | 2021 | 216,404 | | 2020 | 213,539 | | 2019 | 213,179 | | 2018 | 208,994 | | 2017 | 202,552 | | 2016 | 201,021 | | 2015 | 199,638 | | 2014 | 198,400 | | 2013 | 197,319 | | 2012 | 196,407 | | 2011 | 196,477 | | 2010 | 199,204 | | 2009 | 201,856 | | 2008 | 204,412 | | 2007 | 206,856 | | 2006 | 209,173 | | 2005 | 211,366 | | 2004 | 213,405 | | 2003 | 215,292 | | 2002 | 216,829 | | 2001 | 217,351 | | 2000 | 217,802 | | 1999 | 218,172 | | 1998 | 218,466 | | 1997 | 218,702 | | 1996 | 218,897 | | 1995 | 219,020 | | 1994 | 219,062 | | 1993 | 219,038 | | 1992 | 219,059 | | 1991 | 219,456 | | 1990 | 221,019 | | 1989 | 223,407 | | 1988 | 225,737 | | 1987 | 227,989 | | 1986 | 230,114 | | 1985 | 232,056 | | 1984 | 233,764 | | 1983 | 235,185 | | 1982 | 236,270 | | 1981 | 236,993 | | 1980 | 237,250 | | 1979 | 235,481 | | 1978 | 232,850 | | 1977 | 229,830 | | 1976 | 226,639 | | 1975 | 223,431 | | 1974 | 220,263 | | 1973 | 217,135 | | 1972 | 214,006 | | 1971 | 210,837 | | 1970 | 207,523 | | 1969 | 204,384 | | 1968 | 201,164 | | 1967 | 197,719 | | 1966 | 193,991 | | 1965 | 189,919 | | 1964 | 185,502 | | 1963 | 180,805 | | 1962 | 175,940 | | 1961 | 170,982 | | 1960 | 165,929 |
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