Year | Value | 2023 | 306,449 | 2022 | 305,711 | 2021 | 305,866 | 2020 | 306,992 | 2019 | 309,158 | 2018 | 312,038 | 2017 | 315,096 | 2016 | 317,887 | 2015 | 319,963 | 2014 | 321,268 | 2013 | 321,794 | 2012 | 321,530 | 2011 | 320,698 | 2010 | 319,543 | 2009 | 318,454 | 2008 | 317,559 | 2007 | 316,326 | 2006 | 314,314 | 2005 | 311,537 | 2004 | 308,041 | 2003 | 303,624 | 2002 | 297,912 | 2001 | 291,083 | 2000 | 283,004 | 1999 | 273,671 | 1998 | 263,828 | 1997 | 254,131 | 1996 | 244,900 | 1995 | 236,529 | 1994 | 229,415 | 1993 | 223,410 | 1992 | 218,212 | 1991 | 213,683 | 1990 | 209,881 | 1989 | 206,582 | 1988 | 203,555 | 1987 | 200,650 | 1986 | 197,722 | 1985 | 194,525 | 1984 | 190,908 | 1983 | 186,771 | 1982 | 181,939 | 1981 | 177,061 | 1980 | 172,345 | 1979 | 167,581 | 1978 | 163,111 | 1977 | 158,893 | 1976 | 154,774 | 1975 | 150,607 | 1974 | 146,277 |
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