Year | Value | 2022 | 311,132 | 2021 | 308,149 | 2020 | 308,827 | 2019 | 312,335 | 2018 | 318,894 | 2017 | 328,813 | 2016 | 339,044 | 2015 | 346,773 | 2014 | 349,291 | 2013 | 346,170 | 2012 | 338,604 | 2011 | 327,816 | 2010 | 315,822 | 2009 | 304,023 | 2008 | 293,140 | 2007 | 284,084 | 2006 | 277,065 | 2005 | 272,011 | 2004 | 269,043 | 2003 | 266,430 | 2002 | 264,340 | 2001 | 263,597 | 2000 | 264,354 | 1999 | 268,261 | 1998 | 275,100 | 1997 | 282,727 | 1996 | 290,339 | 1995 | 295,523 | 1994 | 296,046 | 1993 | 296,099 | 1992 | 299,826 | 1991 | 305,346 | 1990 | 311,619 | 1989 | 318,374 | 1988 | 321,524 | 1987 | 317,758 | 1986 | 309,221 | 1985 | 298,980 | 1984 | 289,068 | 1983 | 282,517 | 1982 | 280,416 | 1981 | 281,369 | 1980 | 283,649 | 1979 | 284,960 | 1978 | 286,090 | 1977 | 287,577 | 1976 | 288,183 | 1975 | 290,495 | 1974 | 296,643 | 1973 | 305,293 | 1972 | 315,470 | 1971 | 326,921 | 1970 | 336,282 | 1969 | 341,556 | 1968 | 342,456 | 1967 | 337,095 | 1966 | 323,518 | 1965 | 303,909 | 1964 | 283,649 | 1963 | 265,419 | 1962 | 250,311 | 1961 | 239,930 | 1960 | 233,220 |
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