Year | Value | 2022 | 319,649 | 2021 | 314,383 | 2020 | 310,627 | 2019 | 307,861 | 2018 | 305,197 | 2017 | 303,451 | 2016 | 302,360 | 2015 | 298,093 | 2014 | 290,749 | 2013 | 283,303 | 2012 | 275,893 | 2011 | 269,154 | 2010 | 265,306 | 2009 | 265,632 | 2008 | 268,685 | 2007 | 274,199 | 2006 | 282,582 | 2005 | 291,247 | 2004 | 300,755 | 2003 | 313,569 | 2002 | 326,450 | 2001 | 336,505 | 2000 | 345,555 | 1999 | 353,082 | 1998 | 357,641 | 1997 | 360,377 | 1996 | 361,457 | 1995 | 360,059 | 1994 | 355,216 | 1993 | 345,577 | 1992 | 332,243 | 1991 | 317,134 | 1990 | 301,608 | 1989 | 287,234 | 1988 | 275,509 | 1987 | 266,296 | 1986 | 258,036 | 1985 | 252,775 | 1984 | 252,152 | 1983 | 255,438 | 1982 | 262,294 | 1981 | 265,136 | 1980 | 258,200 | 1979 | 252,670 | 1978 | 251,516 | 1977 | 247,635 | 1976 | 251,384 | 1975 | 271,973 | 1974 | 292,828 | 1973 | 294,491 | 1972 | 282,614 | 1971 | 265,240 | 1970 | 242,194 | 1969 | 218,323 | 1968 | 206,319 | 1967 | 206,676 | 1966 | 209,386 | 1965 | 214,467 | 1964 | 220,843 | 1963 | 226,260 | 1962 | 229,045 | 1961 | 228,795 | 1960 | 226,318 |
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