| Year | Value | | 2022 | 3,008,860 | | 2021 | 2,997,544 | | 2020 | 2,995,683 | | 2019 | 2,995,564 | | 2018 | 3,016,555 | | 2017 | 3,066,313 | | 2016 | 3,118,031 | | 2015 | 3,185,015 | | 2014 | 3,271,006 | | 2013 | 3,348,112 | | 2012 | 3,412,541 | | 2011 | 3,479,049 | | 2010 | 3,555,314 | | 2009 | 3,634,071 | | 2008 | 3,731,777 | | 2007 | 3,850,649 | | 2006 | 3,992,252 | | 2005 | 4,153,676 | | 2004 | 4,336,424 | | 2003 | 4,533,485 | | 2002 | 4,695,787 | | 2001 | 4,798,352 | | 2000 | 4,832,694 | | 1999 | 4,796,195 | | 1998 | 4,704,679 | | 1997 | 4,622,984 | | 1996 | 4,463,986 | | 1995 | 4,300,228 | | 1994 | 4,240,020 | | 1993 | 4,163,910 | | 1992 | 4,045,310 | | 1991 | 4,014,294 | | 1990 | 4,006,330 | | 1989 | 3,925,080 | | 1988 | 3,878,296 | | 1987 | 3,846,407 | | 1986 | 3,832,437 | | 1985 | 3,859,323 | | 1984 | 3,899,384 | | 1983 | 3,952,756 | | 1982 | 4,065,491 | | 1981 | 4,233,264 | | 1980 | 4,428,831 | | 1979 | 4,724,498 | | 1978 | 5,094,406 | | 1977 | 5,412,696 | | 1976 | 5,499,437 | | 1975 | 5,346,813 | | 1974 | 5,133,220 | | 1973 | 4,908,123 | | 1972 | 4,688,075 | | 1971 | 4,630,971 | | 1970 | 4,672,775 | | 1969 | 4,638,177 | | 1968 | 4,489,856 | | 1967 | 4,368,249 | | 1966 | 4,267,068 | | 1965 | 4,202,540 | | 1964 | 4,203,787 | | 1963 | 4,236,938 | | 1962 | 4,238,909 | | 1961 | 4,205,787 | | 1960 | 4,154,418 |
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