Year | Value | 2023 | 347,382 | 2022 | 348,612 | 2021 | 349,419 | 2020 | 349,593 | 2019 | 348,808 | 2018 | 346,559 | 2017 | 342,968 | 2016 | 338,390 | 2015 | 333,083 | 2014 | 328,244 | 2013 | 324,393 | 2012 | 320,883 | 2011 | 317,931 | 2010 | 316,212 | 2009 | 315,457 | 2008 | 315,435 | 2007 | 316,584 | 2006 | 319,201 | 2005 | 323,036 | 2004 | 328,041 | 2003 | 334,105 | 2002 | 339,972 | 2001 | 344,606 | 2000 | 347,809 | 1999 | 349,436 | 1998 | 349,817 | 1997 | 349,556 | 1996 | 348,787 | 1995 | 347,259 | 1994 | 345,119 | 1993 | 342,544 | 1992 | 339,067 | 1991 | 334,630 | 1990 | 329,571 | 1989 | 323,713 | 1988 | 316,894 | 1987 | 309,356 | 1986 | 301,209 | 1985 | 292,126 | 1984 | 282,061 | 1983 | 271,397 | 1982 | 260,692 | 1981 | 250,424 | 1980 | 241,252 | 1979 | 233,665 | 1978 | 227,492 | 1977 | 222,331 | 1976 | 218,059 | 1975 | 214,626 | 1974 | 211,728 |
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