Year | Value | 2022 | 351,471 | 2021 | 343,115 | 2020 | 336,253 | 2019 | 330,710 | 2018 | 324,643 | 2017 | 318,585 | 2016 | 313,367 | 2015 | 309,925 | 2014 | 309,940 | 2013 | 312,779 | 2012 | 316,674 | 2011 | 320,775 | 2010 | 322,622 | 2009 | 320,717 | 2008 | 319,028 | 2007 | 320,799 | 2006 | 324,653 | 2005 | 330,473 | 2004 | 337,709 | 2003 | 341,347 | 2002 | 337,703 | 2001 | 328,869 | 2000 | 318,064 | 1999 | 307,603 | 1998 | 300,378 | 1997 | 297,525 | 1996 | 297,914 | 1995 | 299,517 | 1994 | 299,531 | 1993 | 299,139 | 1992 | 299,549 | 1991 | 299,132 | 1990 | 300,004 | 1989 | 304,194 | 1988 | 310,451 | 1987 | 318,223 | 1986 | 328,020 | 1985 | 337,428 | 1984 | 344,075 | 1983 | 346,118 | 1982 | 341,622 | 1981 | 329,536 | 1980 | 311,825 | 1979 | 293,228 | 1978 | 276,113 | 1977 | 261,572 | 1976 | 251,420 | 1975 | 244,635 | 1974 | 237,643 | 1973 | 231,114 | 1972 | 227,540 | 1971 | 226,401 | 1970 | 226,384 | 1969 | 227,155 | 1968 | 229,817 | 1967 | 233,161 | 1966 | 235,822 | 1965 | 239,271 | 1964 | 244,029 | 1963 | 249,736 | 1962 | 256,065 | 1961 | 264,248 | 1960 | 275,094 |
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