| Year | Value | | 2022 | 12,074,095 | | 2021 | 11,628,903 | | 2020 | 11,194,630 | | 2019 | 10,769,575 | | 2018 | 10,365,551 | | 2017 | 9,987,983 | | 2016 | 9,635,123 | | 2015 | 9,313,010 | | 2014 | 9,012,073 | | 2013 | 8,722,613 | | 2012 | 8,448,072 | | 2011 | 8,184,484 | | 2010 | 7,936,757 | | 2009 | 7,698,038 | | 2008 | 7,467,533 | | 2007 | 7,260,900 | | 2006 | 7,065,749 | | 2005 | 6,865,905 | | 2004 | 6,654,583 | | 2003 | 6,437,297 | | 2002 | 6,237,962 | | 2001 | 6,066,300 | | 2000 | 5,918,756 | | 1999 | 5,792,536 | | 1998 | 5,671,697 | | 1997 | 5,532,718 | | 1996 | 5,374,187 | | 1995 | 5,210,521 | | 1994 | 5,063,485 | | 1993 | 4,932,837 | | 1992 | 4,804,968 | | 1991 | 4,695,174 | | 1990 | 4,608,911 | | 1989 | 4,523,344 | | 1988 | 4,441,289 | | 1987 | 4,366,091 | | 1986 | 4,289,248 | | 1985 | 4,216,605 | | 1984 | 4,144,411 | | 1983 | 4,068,367 | | 1982 | 3,993,059 | | 1981 | 3,930,994 | | 1980 | 3,882,583 | | 1979 | 3,824,712 | | 1978 | 3,748,535 | | 1977 | 3,672,487 | | 1976 | 3,600,290 | | 1975 | 3,523,255 | | 1974 | 3,444,533 | | 1973 | 3,363,709 | | 1972 | 3,282,888 | | 1971 | 3,204,636 | | 1970 | 3,127,474 | | 1969 | 3,053,353 | | 1968 | 2,985,066 | | 1967 | 2,922,015 | | 1966 | 2,861,409 | | 1965 | 2,801,663 | | 1964 | 2,742,289 | | 1963 | 2,683,889 | | 1962 | 2,626,247 | | 1961 | 2,569,834 | | 1960 | 2,513,808 |
|