| Year | Value | | 2022 | 13,035,678 | | 2021 | 12,695,921 | | 2020 | 12,376,068 | | 2019 | 12,018,845 | | 2018 | 11,639,081 | | 2017 | 11,263,838 | | 2016 | 10,892,824 | | 2015 | 10,529,969 | | 2014 | 10,169,915 | | 2013 | 9,800,185 | | 2012 | 9,424,283 | | 2011 | 9,051,415 | | 2010 | 8,691,224 | | 2009 | 8,359,785 | | 2008 | 8,055,262 | | 2007 | 7,789,401 | | 2006 | 7,554,518 | | 2005 | 7,340,596 | | 2004 | 7,138,731 | | 2003 | 6,946,591 | | 2002 | 6,759,544 | | 2001 | 6,575,914 | | 2000 | 6,392,014 | | 1999 | 6,206,631 | | 1998 | 6,027,820 | | 1997 | 5,862,676 | | 1996 | 5,710,279 | | 1995 | 5,572,203 | | 1994 | 5,446,941 | | 1993 | 5,329,310 | | 1992 | 5,216,269 | | 1991 | 5,102,069 | | 1990 | 4,984,823 | | 1989 | 4,864,931 | | 1988 | 4,738,361 | | 1987 | 4,604,394 | | 1986 | 4,468,061 | | 1985 | 4,332,466 | | 1984 | 4,197,567 | | 1983 | 4,063,765 | | 1982 | 3,936,437 | | 1981 | 3,821,945 | | 1980 | 3,721,958 | | 1979 | 3,633,937 | | 1978 | 3,557,977 | | 1977 | 3,491,996 | | 1976 | 3,428,150 | | 1975 | 3,359,622 | | 1974 | 3,285,136 | | 1973 | 3,204,541 | | 1972 | 3,118,590 | | 1971 | 3,030,773 | | 1970 | 2,947,046 | | 1969 | 2,868,840 | | 1968 | 2,794,381 | | 1967 | 2,723,559 | | 1966 | 2,653,349 | | 1965 | 2,581,726 | | 1964 | 2,507,068 | | 1963 | 2,428,841 | | 1962 | 2,348,853 | | 1961 | 2,268,272 | | 1960 | 2,187,171 |
|