Year | Value | 2022 | 26,893,435 | 2021 | 27,255,295 | 2020 | 27,499,803 | 2019 | 27,809,230 | 2018 | 28,186,449 | 2017 | 28,663,586 | 2016 | 29,286,439 | 2015 | 30,030,525 | 2014 | 30,832,736 | 2013 | 31,617,215 | 2012 | 32,316,741 | 2011 | 32,835,546 | 2010 | 33,141,942 | 2009 | 33,212,271 | 2008 | 33,195,090 | 2007 | 33,064,822 | 2006 | 32,875,825 | 2005 | 32,751,693 | 2004 | 32,636,650 | 2003 | 32,401,170 | 2002 | 32,114,657 | 2001 | 31,922,714 | 2000 | 31,794,697 | 1999 | 31,722,020 | 1998 | 31,727,006 | 1997 | 31,817,386 | 1996 | 31,968,271 | 1995 | 32,108,993 | 1994 | 32,259,586 | 1993 | 32,461,196 | 1992 | 32,620,397 | 1991 | 32,657,975 | 1990 | 32,716,616 | 1989 | 32,907,085 | 1988 | 33,158,698 | 1987 | 33,423,812 | 1986 | 33,735,482 | 1985 | 34,019,343 | 1984 | 34,145,738 | 1983 | 34,078,105 | 1982 | 33,909,002 | 1981 | 33,624,159 | 1980 | 33,189,531 | 1979 | 32,736,899 | 1978 | 32,290,786 | 1977 | 31,806,962 | 1976 | 31,388,499 | 1975 | 31,068,183 | 1974 | 30,819,752 | 1973 | 30,522,466 | 1972 | 30,129,983 | 1971 | 29,575,963 | 1970 | 28,376,177 | 1969 | 26,637,903 | 1968 | 24,978,652 | 1967 | 23,611,420 | 1966 | 22,875,275 | 1965 | 23,261,532 | 1964 | 24,395,409 | 1963 | 25,726,157 | 1962 | 26,999,760 | 1961 | 27,720,113 | 1960 | 27,749,522 |
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