| Year | Value | | 2022 | 9,914,688 | | 2021 | 9,624,924 | | 2020 | 9,628,231 | | 2019 | 9,768,036 | | 2018 | 9,833,742 | | 2017 | 9,910,660 | | 2016 | 9,976,098 | | 2015 | 9,917,434 | | 2014 | 9,781,741 | | 2013 | 9,627,660 | | 2012 | 9,492,331 | | 2011 | 9,400,203 | | 2010 | 9,372,078 | | 2009 | 9,327,727 | | 2008 | 9,303,948 | | 2007 | 9,285,521 | | 2006 | 9,233,546 | | 2005 | 9,158,612 | | 2004 | 9,076,543 | | 2003 | 9,017,205 | | 2002 | 8,981,036 | | 2001 | 8,953,528 | | 2000 | 8,896,970 | | 1999 | 8,655,496 | | 1998 | 8,109,631 | | 1997 | 7,403,872 | | 1996 | 6,693,239 | | 1995 | 6,103,413 | | 1994 | 5,941,930 | | 1993 | 6,287,287 | | 1992 | 6,839,092 | | 1991 | 7,363,007 | | 1990 | 7,731,594 | | 1989 | 7,854,206 | | 1988 | 7,801,121 | | 1987 | 7,692,892 | | 1986 | 7,579,844 | | 1985 | 7,458,777 | | 1984 | 7,299,080 | | 1983 | 7,133,794 | | 1982 | 6,980,049 | | 1981 | 6,837,253 | | 1980 | 6,712,482 | | 1979 | 6,565,985 | | 1978 | 6,384,639 | | 1977 | 6,191,136 | | 1976 | 5,999,856 | | 1975 | 5,803,762 | | 1974 | 5,619,737 | | 1973 | 5,473,988 | | 1972 | 5,318,412 | | 1971 | 5,153,668 | | 1970 | 5,007,808 | | 1969 | 4,888,400 | | 1968 | 4,779,340 | | 1967 | 4,679,453 | | 1966 | 4,578,817 | | 1965 | 4,476,582 | | 1964 | 4,370,033 | | 1963 | 4,242,329 | | 1962 | 4,116,821 | | 1961 | 3,994,913 | | 1960 | 3,869,914 |
|