| Year | Value | | 2022 | 6,948,392 | | 2021 | 6,850,540 | | 2020 | 6,755,895 | | 2019 | 6,663,924 | | 2018 | 6,572,233 | | 2017 | 6,480,532 | | 2016 | 6,389,235 | | 2015 | 6,298,598 | | 2014 | 6,208,676 | | 2013 | 6,119,379 | | 2012 | 6,030,607 | | 2011 | 5,942,553 | | 2010 | 5,855,734 | | 2009 | 5,770,639 | | 2008 | 5,687,744 | | 2007 | 5,607,453 | | 2006 | 5,529,811 | | 2005 | 5,454,678 | | 2004 | 5,386,223 | | 2003 | 5,323,062 | | 2002 | 5,259,006 | | 2001 | 5,192,764 | | 2000 | 5,123,222 | | 1999 | 5,049,878 | | 1998 | 4,974,552 | | 1997 | 4,895,962 | | 1996 | 4,812,391 | | 1995 | 4,721,929 | | 1994 | 4,625,260 | | 1993 | 4,526,689 | | 1992 | 4,427,172 | | 1991 | 4,327,289 | | 1990 | 4,227,820 | | 1989 | 4,129,447 | | 1988 | 4,033,291 | | 1987 | 3,941,463 | | 1986 | 3,852,017 | | 1985 | 3,763,034 | | 1984 | 3,674,501 | | 1983 | 3,584,610 | | 1982 | 3,491,906 | | 1981 | 3,397,659 | | 1980 | 3,303,309 | | 1979 | 3,214,311 | | 1978 | 3,128,544 | | 1977 | 3,038,680 | | 1976 | 2,947,454 | | 1975 | 2,857,461 | | 1974 | 2,769,211 | | 1973 | 2,682,747 | | 1972 | 2,603,182 | | 1971 | 2,525,481 | | 1970 | 2,444,767 | | 1969 | 2,366,635 | | 1968 | 2,291,300 | | 1967 | 2,219,001 | | 1966 | 2,150,003 | | 1965 | 2,084,097 | | 1964 | 2,020,941 | | 1963 | 1,960,155 | | 1962 | 1,901,451 | | 1961 | 1,844,630 | | 1960 | 1,789,684 |
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