Year | Value | 2022 | 273,165 | 2021 | 273,003 | 2020 | 272,707 | 2019 | 274,662 | 2018 | 278,766 | 2017 | 286,950 | 2016 | 299,711 | 2015 | 316,510 | 2014 | 336,888 | 2013 | 354,525 | 2012 | 362,810 | 2011 | 356,328 | 2010 | 344,072 | 2009 | 334,143 | 2008 | 323,203 | 2007 | 318,089 | 2006 | 312,200 | 2005 | 300,317 | 2004 | 291,560 | 2003 | 286,604 | 2002 | 281,641 | 2001 | 279,992 | 2000 | 281,304 | 1999 | 278,618 | 1998 | 271,807 | 1997 | 265,349 | 1996 | 259,585 | 1995 | 255,701 | 1994 | 255,053 | 1993 | 258,060 | 1992 | 262,926 | 1991 | 268,967 | 1990 | 275,975 | 1989 | 285,309 | 1988 | 292,635 | 1987 | 295,627 | 1986 | 298,832 | 1985 | 301,826 | 1984 | 302,708 | 1983 | 304,420 | 1982 | 307,870 | 1981 | 310,728 | 1980 | 310,315 | 1979 | 306,851 | 1978 | 288,736 | 1977 | 256,738 | 1976 | 225,118 | 1975 | 199,546 | 1974 | 192,082 | 1973 | 209,879 | 1972 | 241,950 | 1971 | 273,665 | 1970 | 299,183 | 1969 | 309,995 | 1968 | 310,076 | 1967 | 306,947 | 1966 | 301,886 | 1965 | 295,413 | 1964 | 287,468 | 1963 | 281,240 | 1962 | 277,970 | 1961 | 275,767 | 1960 | 275,275 |
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