Year | Value | 2022 | 304,377 | 2021 | 305,680 | 2020 | 308,785 | 2019 | 312,647 | 2018 | 316,309 | 2017 | 319,919 | 2016 | 323,599 | 2015 | 326,984 | 2014 | 329,568 | 2013 | 331,578 | 2012 | 332,153 | 2011 | 330,470 | 2010 | 324,882 | 2009 | 319,235 | 2008 | 312,780 | 2007 | 306,024 | 2006 | 300,869 | 2005 | 297,550 | 2004 | 295,420 | 2003 | 294,440 | 2002 | 294,802 | 2001 | 295,199 | 2000 | 295,019 | 1999 | 295,513 | 1998 | 297,825 | 1997 | 301,844 | 1996 | 306,752 | 1995 | 311,750 | 1994 | 315,361 | 1993 | 316,389 | 1992 | 314,446 | 1991 | 310,591 | 1990 | 306,152 | 1989 | 302,522 | 1988 | 300,221 | 1987 | 299,878 | 1986 | 301,956 | 1985 | 305,380 | 1984 | 309,158 | 1983 | 311,850 | 1982 | 312,788 | 1981 | 312,243 | 1980 | 310,789 | 1979 | 309,974 | 1978 | 312,195 | 1977 | 318,085 | 1976 | 327,049 | 1975 | 337,501 | 1974 | 346,838 | 1973 | 353,543 | 1972 | 358,456 | 1971 | 362,704 | 1970 | 368,900 | 1969 | 378,217 | 1968 | 388,099 | 1967 | 395,448 | 1966 | 399,945 | 1965 | 401,323 | 1964 | 399,119 | 1963 | 395,828 | 1962 | 392,915 | 1961 | 389,936 | 1960 | 386,134 |
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