Year | Value | 2023 | 320,163 | 2022 | 317,773 | 2021 | 317,716 | 2020 | 319,506 | 2019 | 323,590 | 2018 | 329,031 | 2017 | 334,452 | 2016 | 338,961 | 2015 | 342,338 | 2014 | 344,882 | 2013 | 346,921 | 2012 | 348,494 | 2011 | 349,269 | 2010 | 348,601 | 2009 | 345,704 | 2008 | 337,837 | 2007 | 327,192 | 2006 | 314,781 | 2005 | 297,543 | 2004 | 276,848 | 2003 | 254,453 | 2002 | 232,766 | 2001 | 213,767 | 2000 | 197,496 | 1999 | 183,722 | 1998 | 172,726 | 1997 | 162,953 | 1996 | 151,287 | 1995 | 136,516 | 1994 | 119,644 | 1993 | 103,251 | 1992 | 92,174 | 1991 | 91,454 | 1990 | 102,228 | 1989 | 122,026 | 1988 | 146,355 | 1987 | 169,461 | 1986 | 185,901 | 1985 | 194,033 | 1984 | 193,698 | 1983 | 186,784 | 1982 | 176,878 | 1981 | 166,456 | 1980 | 158,709 | 1979 | 155,991 | 1978 | 156,253 | 1977 | 154,418 | 1976 | 148,480 | 1975 | 141,526 | 1974 | 134,799 |
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