| Year | Value | | 2022 | 15,366,987 | | 2021 | 14,809,632 | | 2020 | 14,264,826 | | 2019 | 13,736,863 | | 2018 | 13,259,705 | | 2017 | 12,866,109 | | 2016 | 12,522,677 | | 2015 | 12,204,064 | | 2014 | 11,917,452 | | 2013 | 11,637,963 | | 2012 | 11,328,323 | | 2011 | 10,965,519 | | 2010 | 10,580,409 | | 2009 | 10,200,013 | | 2008 | 9,834,655 | | 2007 | 9,479,361 | | 2006 | 9,127,564 | | 2005 | 8,809,753 | | 2004 | 8,535,098 | | 2003 | 8,286,111 | | 2002 | 8,047,179 | | 2001 | 7,811,472 | | 2000 | 7,591,784 | | 1999 | 7,379,062 | | 1998 | 7,148,250 | | 1997 | 6,908,881 | | 1996 | 6,686,196 | | 1995 | 6,491,722 | | 1994 | 6,314,019 | | 1993 | 6,148,863 | | 1992 | 6,015,212 | | 1991 | 5,923,655 | | 1990 | 5,840,907 | | 1989 | 5,743,206 | | 1988 | 5,647,195 | | 1987 | 5,538,120 | | 1986 | 5,412,143 | | 1985 | 5,290,290 | | 1984 | 5,171,854 | | 1983 | 5,058,157 | | 1982 | 4,950,089 | | 1981 | 4,857,965 | | 1980 | 4,781,720 | | 1979 | 4,684,798 | | 1978 | 4,554,931 | | 1977 | 4,424,314 | | 1976 | 4,305,960 | | 1975 | 4,193,061 | | 1974 | 4,086,834 | | 1973 | 3,985,032 | | 1972 | 3,893,522 | | 1971 | 3,809,219 | | 1970 | 3,725,986 | | 1969 | 3,645,608 | | 1968 | 3,568,691 | | 1967 | 3,493,466 | | 1966 | 3,420,674 | | 1965 | 3,350,782 | | 1964 | 3,283,000 | | 1963 | 3,216,037 | | 1962 | 3,149,416 | | 1961 | 3,083,816 | | 1960 | 3,020,190 |
|