| Year | Value | | 2022 | 245,194 | | 2021 | 248,071 | | 2020 | 252,368 | | 2019 | 258,098 | | 2018 | 264,291 | | 2017 | 269,839 | | 2016 | 274,164 | | 2015 | 276,679 | | 2014 | 277,620 | | 2013 | 278,279 | | 2012 | 279,405 | | 2011 | 280,217 | | 2010 | 280,864 | | 2009 | 282,888 | | 2008 | 286,583 | | 2007 | 292,142 | | 2006 | 301,150 | | 2005 | 313,266 | | 2004 | 326,074 | | 2003 | 338,440 | | 2002 | 349,437 | | 2001 | 358,592 | | 2000 | 366,464 | | 1999 | 373,845 | | 1998 | 381,356 | | 1997 | 388,809 | | 1996 | 395,872 | | 1995 | 402,404 | | 1994 | 407,962 | | 1993 | 412,339 | | 1992 | 412,901 | | 1991 | 409,190 | | 1990 | 404,218 | | 1989 | 399,186 | | 1988 | 394,348 | | 1987 | 390,814 | | 1986 | 389,624 | | 1985 | 388,755 | | 1984 | 386,358 | | 1983 | 382,446 | | 1982 | 377,748 | | 1981 | 375,163 | | 1980 | 373,301 | | 1979 | 369,131 | | 1978 | 364,002 | | 1977 | 358,652 | | 1976 | 353,283 | | 1975 | 347,743 | | 1974 | 342,532 | | 1973 | 338,036 | | 1972 | 333,585 | | 1971 | 329,682 | | 1970 | 326,705 | | 1969 | 323,486 | | 1968 | 318,618 | | 1967 | 311,994 | | 1966 | 303,615 | | 1965 | 294,031 | | 1964 | 284,679 | | 1963 | 276,239 | | 1962 | 268,587 | | 1961 | 261,155 | | 1960 | 254,007 |
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