| Year | Value | | 2022 | 5,764,250 | | 2021 | 6,027,946 | | 2020 | 6,182,609 | | 2019 | 6,259,138 | | 2018 | 6,290,023 | | 2017 | 6,247,578 | | 2016 | 6,113,385 | | 2015 | 5,995,893 | | 2014 | 5,896,131 | | 2013 | 5,759,690 | | 2012 | 5,634,295 | | 2011 | 5,565,188 | | 2010 | 5,501,390 | | 2009 | 5,438,380 | | 2008 | 5,380,479 | | 2007 | 5,325,131 | | 2006 | 5,268,215 | | 2005 | 5,189,966 | | 2004 | 5,091,627 | | 2003 | 4,990,241 | | 2002 | 4,877,245 | | 2001 | 4,783,061 | | 2000 | 4,761,260 | | 1999 | 4,824,053 | | 1998 | 4,997,765 | | 1997 | 5,252,205 | | 1996 | 5,546,461 | | 1995 | 5,859,236 | | 1994 | 6,138,908 | | 1993 | 6,335,424 | | 1992 | 6,451,298 | | 1991 | 6,473,085 | | 1990 | 6,426,096 | | 1989 | 6,401,585 | | 1988 | 6,330,013 | | 1987 | 6,236,887 | | 1986 | 6,168,138 | | 1985 | 6,063,020 | | 1984 | 5,934,550 | | 1983 | 5,792,434 | | 1982 | 5,622,198 | | 1981 | 5,416,553 | | 1980 | 5,018,226 | | 1979 | 4,374,359 | | 1978 | 3,704,325 | | 1977 | 3,186,654 | | 1976 | 3,016,931 | | 1975 | 3,311,834 | | 1974 | 3,979,727 | | 1973 | 4,831,019 | | 1972 | 5,612,149 | | 1971 | 5,995,160 | | 1970 | 5,982,931 | | 1969 | 5,707,862 | | 1968 | 5,255,067 | | 1967 | 4,903,496 | | 1966 | 4,734,831 | | 1965 | 4,800,133 | | 1964 | 5,074,869 | | 1963 | 5,503,647 | | 1962 | 5,830,537 | | 1961 | 6,036,006 | | 1960 | 6,136,169 |
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