Year | Value | 2022 | 284,224 | 2021 | 287,702 | 2020 | 291,445 | 2019 | 294,076 | 2018 | 294,863 | 2017 | 293,816 | 2016 | 290,496 | 2015 | 284,803 | 2014 | 279,401 | 2013 | 276,012 | 2012 | 275,030 | 2011 | 276,215 | 2010 | 277,044 | 2009 | 275,197 | 2008 | 270,796 | 2007 | 264,674 | 2006 | 258,275 | 2005 | 253,943 | 2004 | 253,176 | 2003 | 255,683 | 2002 | 261,242 | 2001 | 270,055 | 2000 | 280,144 | 1999 | 291,429 | 1998 | 304,540 | 1997 | 316,840 | 1996 | 326,471 | 1995 | 335,033 | 1994 | 341,751 | 1993 | 344,510 | 1992 | 343,084 | 1991 | 338,456 | 1990 | 331,916 | 1989 | 323,672 | 1988 | 314,949 | 1987 | 307,491 | 1986 | 300,684 | 1985 | 292,958 | 1984 | 284,287 | 1983 | 275,837 | 1982 | 268,552 | 1981 | 260,310 | 1980 | 253,874 | 1979 | 252,652 | 1978 | 255,210 | 1977 | 259,872 | 1976 | 260,654 | 1975 | 253,944 | 1974 | 248,920 | 1973 | 246,241 | 1972 | 240,041 | 1971 | 242,405 | 1970 | 260,943 | 1969 | 279,428 | 1968 | 281,919 | 1967 | 272,465 | 1966 | 255,582 | 1965 | 232,021 | 1964 | 207,984 | 1963 | 195,687 | 1962 | 196,600 | 1961 | 201,144 | 1960 | 207,569 |
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