| Year | Value | | 2022 | 2,916,676 | | 2021 | 2,886,132 | | 2020 | 3,018,556 | | 2019 | 3,140,141 | | 2018 | 3,255,408 | | 2017 | 3,369,017 | | 2016 | 3,471,782 | | 2015 | 3,560,504 | | 2014 | 3,634,139 | | 2013 | 3,691,291 | | 2012 | 3,736,634 | | 2011 | 3,790,978 | | 2010 | 3,850,116 | | 2009 | 3,917,676 | | 2008 | 3,985,338 | | 2007 | 4,058,624 | | 2006 | 4,133,332 | | 2005 | 4,184,524 | | 2004 | 4,202,470 | | 2003 | 4,178,799 | | 2002 | 4,119,282 | | 2001 | 4,052,904 | | 2000 | 3,983,293 | | 1999 | 3,915,300 | | 1998 | 3,874,052 | | 1997 | 3,872,447 | | 1996 | 3,831,937 | | 1995 | 3,753,903 | | 1994 | 3,687,386 | | 1993 | 3,619,495 | | 1992 | 3,555,780 | | 1991 | 3,576,397 | | 1990 | 3,671,571 | | 1989 | 3,769,217 | | 1988 | 3,871,988 | | 1987 | 3,988,436 | | 1986 | 4,119,145 | | 1985 | 4,249,964 | | 1984 | 4,365,719 | | 1983 | 4,443,465 | | 1982 | 4,480,648 | | 1981 | 4,484,055 | | 1980 | 4,459,342 | | 1979 | 4,421,220 | | 1978 | 4,374,229 | | 1977 | 4,300,542 | | 1976 | 4,188,147 | | 1975 | 3,999,401 | | 1974 | 3,776,115 | | 1973 | 3,576,369 | | 1972 | 3,395,872 | | 1971 | 3,266,810 | | 1970 | 3,241,709 | | 1969 | 3,281,574 | | 1968 | 3,324,047 | | 1967 | 3,372,674 | | 1966 | 3,416,159 | | 1965 | 3,453,480 | | 1964 | 3,478,415 | | 1963 | 3,498,086 | | 1962 | 3,530,050 | | 1961 | 3,572,296 | | 1960 | 3,623,149 |
|