| Year | Value | | 2022 | 11,736,385 | | 2021 | 11,632,140 | | 2020 | 11,622,764 | | 2019 | 11,547,039 | | 2018 | 11,503,086 | | 2017 | 11,456,798 | | 2016 | 11,417,352 | | 2015 | 11,377,416 | | 2014 | 11,378,194 | | 2013 | 11,435,173 | | 2012 | 11,545,507 | | 2011 | 11,694,405 | | 2010 | 11,841,028 | | 2009 | 11,913,982 | | 2008 | 11,898,065 | | 2007 | 11,795,575 | | 2006 | 11,642,429 | | 2005 | 11,464,028 | | 2004 | 11,281,190 | | 2003 | 11,117,232 | | 2002 | 10,984,799 | | 2001 | 10,880,708 | | 2000 | 10,810,418 | | 1999 | 10,731,624 | | 1998 | 10,614,319 | | 1997 | 10,438,425 | | 1996 | 10,204,546 | | 1995 | 9,948,949 | | 1994 | 9,712,401 | | 1993 | 9,531,984 | | 1992 | 9,439,075 | | 1991 | 9,504,939 | | 1990 | 9,700,291 | | 1989 | 9,884,773 | | 1988 | 10,028,158 | | 1987 | 10,145,861 | | 1986 | 10,217,050 | | 1985 | 10,273,789 | | 1984 | 10,424,995 | | 1983 | 10,675,199 | | 1982 | 10,964,395 | | 1981 | 11,279,966 | | 1980 | 11,548,941 | | 1979 | 11,696,821 | | 1978 | 11,741,495 | | 1977 | 11,744,364 | | 1976 | 11,696,367 | | 1975 | 11,588,418 | | 1974 | 11,436,149 | | 1973 | 11,261,394 | | 1972 | 11,026,531 | | 1971 | 10,926,869 | | 1970 | 10,682,337 | | 1969 | 10,167,323 | | 1968 | 9,786,935 | | 1967 | 9,640,933 | | 1966 | 9,365,662 | | 1965 | 8,991,888 | | 1964 | 8,788,804 | | 1963 | 8,542,177 | | 1962 | 8,121,434 | | 1961 | 7,589,619 | | 1960 | 7,228,370 |
|