| Year | Value | | 2022 | 11,031,274 | | 2021 | 10,971,252 | | 2020 | 10,952,946 | | 2019 | 10,846,744 | | 2018 | 10,770,283 | | 2017 | 10,643,766 | | 2016 | 10,460,924 | | 2015 | 10,243,210 | | 2014 | 10,059,841 | | 2013 | 9,944,006 | | 2012 | 9,913,068 | | 2011 | 10,017,488 | | 2010 | 10,240,513 | | 2009 | 10,446,651 | | 2008 | 10,585,988 | | 2007 | 10,647,958 | | 2006 | 10,625,730 | | 2005 | 10,585,420 | | 2004 | 10,651,250 | | 2003 | 10,822,154 | | 2002 | 11,020,825 | | 2001 | 11,219,212 | | 2000 | 11,396,616 | | 1999 | 11,481,209 | | 1998 | 11,499,354 | | 1997 | 11,484,503 | | 1996 | 11,413,417 | | 1995 | 11,289,390 | | 1994 | 11,129,194 | | 1993 | 10,931,181 | | 1992 | 10,659,655 | | 1991 | 10,509,511 | | 1990 | 10,260,144 | | 1989 | 9,749,763 | | 1988 | 9,384,771 | | 1987 | 9,259,979 | | 1986 | 9,002,688 | | 1985 | 8,642,879 | | 1984 | 8,476,148 | | 1983 | 8,277,570 | | 1982 | 7,890,803 | | 1981 | 7,403,374 | | 1980 | 7,088,507 | | 1979 | 6,909,795 | | 1978 | 6,639,575 | | 1977 | 6,341,133 | | 1976 | 6,163,353 | | 1975 | 6,039,899 | | 1974 | 5,896,551 | | 1973 | 5,803,194 | | 1972 | 5,755,175 | | 1971 | 5,717,377 | | 1970 | 5,689,600 | | 1969 | 5,767,060 | | 1968 | 5,845,263 | | 1967 | 5,884,728 | | 1966 | 5,992,484 | | 1965 | 6,092,563 | | 1964 | 6,089,107 | | 1963 | 6,242,072 | | 1962 | 6,422,695 | | 1961 | 6,362,025 | | 1960 | 6,343,683 |
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