| Year | Value | | 2024 | 300,250 | | 2023 | 300,045 | | 2022 | 300,027 | | 2021 | 300,775 | | 2020 | 301,687 | | 2019 | 301,917 | | 2018 | 301,804 | | 2017 | 301,600 | | 2016 | 301,306 | | 2015 | 300,935 | | 2014 | 300,438 | | 2013 | 299,794 | | 2012 | 299,127 | | 2011 | 298,482 | | 2010 | 297,849 | | 2009 | 297,028 | | 2008 | 296,060 | | 2007 | 295,178 | | 2006 | 294,410 | | 2005 | 293,657 | | 2004 | 292,791 | | 2003 | 292,222 | | 2002 | 291,510 | | 2001 | 290,920 | | 2000 | 290,348 | | 1999 | 291,437 | | 1998 | 292,788 | | 1997 | 294,196 | | 1996 | 295,377 | | 1995 | 296,139 | | 1994 | 296,362 | | 1993 | 296,119 | | 1992 | 295,628 | | 1991 | 295,191 | | 1990 | 294,971 | | 1989 | 295,107 | | 1988 | 295,498 | | 1987 | 295,777 | | 1986 | 295,459 | | 1985 | 294,209 | | 1984 | 291,869 | | 1983 | 288,595 | | 1982 | 284,736 | | 1981 | 280,815 | | 1980 | 277,203 | | 1979 | 274,114 | | 1978 | 271,483 | | 1977 | 268,993 | | 1976 | 266,189 | | 1975 | 262,829 |
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