| Year | Value | | 2022 | 10,621,075 | | 2021 | 10,960,242 | | 2020 | 11,211,207 | | 2019 | 11,383,102 | | 2018 | 11,384,341 | | 2017 | 11,297,477 | | 2016 | 11,120,845 | | 2015 | 10,828,562 | | 2014 | 10,549,373 | | 2013 | 10,330,744 | | 2012 | 10,072,064 | | 2011 | 9,812,235 | | 2010 | 9,602,934 | | 2009 | 9,422,583 | | 2008 | 9,186,558 | | 2007 | 8,901,329 | | 2006 | 8,576,671 | | 2005 | 7,999,058 | | 2004 | 7,175,956 | | 2003 | 6,384,491 | | 2002 | 5,838,429 | | 2001 | 5,685,003 | | 2000 | 6,028,035 | | 1999 | 6,759,673 | | 1998 | 7,678,307 | | 1997 | 8,560,157 | | 1996 | 9,053,542 | | 1995 | 9,132,659 | | 1994 | 8,907,662 | | 1993 | 8,423,098 | | 1992 | 7,929,058 | | 1991 | 7,626,402 | | 1990 | 7,594,848 | | 1989 | 7,840,988 | | 1988 | 8,257,146 | | 1987 | 8,582,713 | | 1986 | 8,685,914 | | 1985 | 8,519,243 | | 1984 | 8,090,227 | | 1983 | 7,483,807 | | 1982 | 6,754,783 | | 1981 | 6,030,487 | | 1980 | 5,414,871 | | 1979 | 4,910,975 | | 1978 | 4,561,195 | | 1977 | 4,297,612 | | 1976 | 4,063,538 | | 1975 | 3,978,399 | | 1974 | 4,072,580 | | 1973 | 4,218,512 | | 1972 | 4,452,229 | | 1971 | 4,766,637 | | 1970 | 4,987,359 | | 1969 | 5,056,950 | | 1968 | 5,007,639 | | 1967 | 4,917,648 | | 1966 | 4,827,028 | | 1965 | 4,706,049 | | 1964 | 4,560,227 | | 1963 | 4,435,674 | | 1962 | 4,293,721 | | 1961 | 4,094,827 | | 1960 | 3,917,410 |
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