Year | Value | 2022 | 233,699 | 2021 | 240,019 | 2020 | 248,038 | 2019 | 254,509 | 2018 | 260,531 | 2017 | 265,743 | 2016 | 268,953 | 2015 | 269,366 | 2014 | 268,072 | 2013 | 266,124 | 2012 | 262,917 | 2011 | 259,868 | 2010 | 258,027 | 2009 | 257,338 | 2008 | 257,155 | 2007 | 257,711 | 2006 | 259,631 | 2005 | 260,035 | 2004 | 255,791 | 2003 | 248,860 | 2002 | 241,204 | 2001 | 234,273 | 2000 | 231,721 | 1999 | 234,289 | 1998 | 240,045 | 1997 | 248,932 | 1996 | 260,613 | 1995 | 272,357 | 1994 | 284,955 | 1993 | 298,254 | 1992 | 307,713 | 1991 | 312,636 | 1990 | 316,256 | 1989 | 319,056 | 1988 | 321,449 | 1987 | 324,946 | 1986 | 327,594 | 1985 | 327,164 | 1984 | 323,383 | 1983 | 316,998 | 1982 | 310,244 | 1981 | 302,976 | 1980 | 293,849 | 1979 | 284,045 | 1978 | 275,297 | 1977 | 267,335 | 1976 | 259,585 | 1975 | 255,858 | 1974 | 256,727 | 1973 | 258,247 | 1972 | 259,932 | 1971 | 258,159 | 1970 | 249,025 | 1969 | 242,974 | 1968 | 242,850 | 1967 | 240,608 | 1966 | 245,566 | 1965 | 265,541 | 1964 | 284,497 | 1963 | 286,119 | 1962 | 275,567 | 1961 | 258,512 | 1960 | 234,276 |
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