Year | Value | 2022 | 313,797 | 2021 | 306,957 | 2020 | 299,677 | 2019 | 294,023 | 2018 | 287,957 | 2017 | 281,688 | 2016 | 277,348 | 2015 | 277,036 | 2014 | 281,097 | 2013 | 289,081 | 2012 | 300,623 | 2011 | 313,411 | 2010 | 323,803 | 2009 | 328,150 | 2008 | 326,613 | 2007 | 320,374 | 2006 | 310,475 | 2005 | 299,464 | 2004 | 288,806 | 2003 | 278,800 | 2002 | 270,471 | 2001 | 264,329 | 2000 | 260,097 | 1999 | 257,993 | 1998 | 256,631 | 1997 | 256,059 | 1996 | 256,856 | 1995 | 258,928 | 1994 | 263,183 | 1993 | 269,736 | 1992 | 277,235 | 1991 | 284,535 | 1990 | 289,029 | 1989 | 288,966 | 1988 | 288,572 | 1987 | 291,554 | 1986 | 296,345 | 1985 | 302,253 | 1984 | 309,259 | 1983 | 312,955 | 1982 | 309,525 | 1981 | 301,183 | 1980 | 290,936 | 1979 | 280,824 | 1978 | 273,981 | 1977 | 271,382 | 1976 | 271,754 | 1975 | 273,703 | 1974 | 274,967 | 1973 | 276,450 | 1972 | 278,911 | 1971 | 280,477 | 1970 | 282,486 | 1969 | 287,148 | 1968 | 294,325 | 1967 | 303,097 | 1966 | 312,955 | 1965 | 321,619 | 1964 | 327,543 | 1963 | 329,107 | 1962 | 324,199 | 1961 | 311,516 | 1960 | 293,399 |
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