Year | Value | 2022 | 314,836 | 2021 | 314,136 | 2020 | 311,339 | 2019 | 307,581 | 2018 | 304,380 | 2017 | 301,960 | 2016 | 299,476 | 2015 | 296,143 | 2014 | 291,415 | 2013 | 285,094 | 2012 | 278,709 | 2011 | 272,058 | 2010 | 265,362 | 2009 | 261,062 | 2008 | 257,872 | 2007 | 255,292 | 2006 | 257,067 | 2005 | 262,342 | 2004 | 268,112 | 2003 | 274,233 | 2002 | 280,238 | 2001 | 283,371 | 2000 | 287,955 | 1999 | 296,116 | 1998 | 303,279 | 1997 | 308,399 | 1996 | 310,212 | 1995 | 308,177 | 1994 | 302,630 | 1993 | 295,135 | 1992 | 287,679 | 1991 | 278,482 | 1990 | 268,763 | 1989 | 261,327 | 1988 | 255,125 | 1987 | 249,626 | 1986 | 244,722 | 1985 | 241,975 | 1984 | 242,219 | 1983 | 244,651 | 1982 | 247,745 | 1981 | 251,298 | 1980 | 254,231 | 1979 | 255,822 | 1978 | 256,637 | 1977 | 256,469 | 1976 | 255,021 | 1975 | 252,051 | 1974 | 245,962 | 1973 | 237,749 | 1972 | 230,188 | 1971 | 224,929 | 1970 | 222,686 | 1969 | 219,457 | 1968 | 214,677 | 1967 | 210,764 | 1966 | 206,982 | 1965 | 203,386 | 1964 | 199,728 | 1963 | 195,180 | 1962 | 190,134 | 1961 | 184,957 | 1960 | 181,760 |
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