Year | Value | 2022 | 301,438 | 2021 | 304,537 | 2020 | 307,449 | 2019 | 309,224 | 2018 | 308,815 | 2017 | 306,964 | 2016 | 303,515 | 2015 | 300,640 | 2014 | 298,795 | 2013 | 296,267 | 2012 | 293,519 | 2011 | 290,483 | 2010 | 285,374 | 2009 | 278,650 | 2008 | 272,445 | 2007 | 265,947 | 2006 | 258,492 | 2005 | 251,638 | 2004 | 245,629 | 2003 | 239,825 | 2002 | 235,499 | 2001 | 234,317 | 2000 | 237,583 | 1999 | 245,966 | 1998 | 258,673 | 1997 | 274,055 | 1996 | 289,946 | 1995 | 303,159 | 1994 | 309,878 | 1993 | 309,804 | 1992 | 304,453 | 1991 | 294,977 | 1990 | 283,327 | 1989 | 271,003 | 1988 | 259,668 | 1987 | 250,969 | 1986 | 245,342 | 1985 | 242,358 | 1984 | 241,893 | 1983 | 242,419 | 1982 | 243,677 | 1981 | 245,988 | 1980 | 249,274 | 1979 | 254,911 | 1978 | 262,731 | 1977 | 270,729 | 1976 | 278,183 | 1975 | 283,094 | 1974 | 283,758 | 1973 | 284,338 | 1972 | 288,441 | 1971 | 293,962 | 1970 | 299,322 | 1969 | 304,944 | 1968 | 307,827 | 1967 | 304,103 | 1966 | 295,111 | 1965 | 283,952 | 1964 | 273,357 | 1963 | 266,718 | 1962 | 264,785 | 1961 | 265,707 | 1960 | 268,185 |
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