Year | Value | 2023 | 235,980 | 2022 | 234,236 | 2021 | 242,393 | 2020 | 236,588 | 2019 | 231,281 | 2018 | 227,355 | 2017 | 229,244 | 2016 | 237,887 | 2015 | 246,632 | 2014 | 250,847 | 2013 | 252,335 | 2012 | 254,834 | 2011 | 257,846 | 2010 | 261,357 | 2009 | 265,864 | 2008 | 271,032 | 2007 | 275,305 | 2006 | 276,719 | 2005 | 278,334 | 2004 | 283,813 | 2003 | 290,089 | 2002 | 295,214 | 2001 | 304,928 | 2000 | 310,907 | 1999 | 304,488 | 1998 | 293,450 | 1997 | 281,913 | 1996 | 270,247 | 1995 | 260,137 | 1994 | 253,929 | 1993 | 251,127 | 1992 | 252,597 | 1991 | 257,961 | 1990 | 266,328 | 1989 | 279,920 | 1988 | 292,793 | 1987 | 299,776 | 1986 | 303,329 | 1985 | 304,347 | 1984 | 302,948 | 1983 | 300,388 | 1982 | 299,383 | 1981 | 300,300 | 1980 | 302,580 | 1979 | 305,764 | 1978 | 308,898 | 1977 | 309,147 | 1976 | 305,804 | 1975 | 299,578 | 1974 | 286,682 |
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