| Year | Value | | 2022 | 16,176,217 | | 2021 | 15,737,224 | | 2020 | 15,293,299 | | 2019 | 14,851,787 | | 2018 | 14,426,886 | | 2017 | 14,002,439 | | 2016 | 13,561,220 | | 2015 | 13,128,327 | | 2014 | 12,722,751 | | 2013 | 12,326,038 | | 2012 | 11,941,725 | | 2011 | 11,577,539 | | 2010 | 11,236,221 | | 2009 | 10,923,458 | | 2008 | 10,636,233 | | 2007 | 10,360,896 | | 2006 | 10,094,544 | | 2005 | 9,838,645 | | 2004 | 9,586,551 | | 2003 | 9,339,183 | | 2002 | 9,100,891 | | 2001 | 8,872,203 | | 2000 | 8,655,917 | | 1999 | 8,451,625 | | 1998 | 8,255,097 | | 1997 | 8,064,784 | | 1996 | 7,850,152 | | 1995 | 7,610,238 | | 1994 | 7,274,126 | | 1993 | 6,926,213 | | 1992 | 6,733,757 | | 1991 | 6,606,891 | | 1990 | 6,479,069 | | 1989 | 6,371,681 | | 1988 | 6,305,868 | | 1987 | 6,313,609 | | 1986 | 6,296,155 | | 1985 | 6,193,326 | | 1984 | 6,078,780 | | 1983 | 5,954,343 | | 1982 | 5,825,275 | | 1981 | 5,696,104 | | 1980 | 5,583,831 | | 1979 | 5,447,917 | | 1978 | 5,269,303 | | 1977 | 5,095,881 | | 1976 | 4,935,974 | | 1975 | 4,787,769 | | 1974 | 4,647,260 | | 1973 | 4,515,990 | | 1972 | 4,392,757 | | 1971 | 4,279,120 | | 1970 | 4,174,900 | | 1969 | 4,076,791 | | 1968 | 3,982,803 | | 1967 | 3,891,537 | | 1966 | 3,802,819 | | 1965 | 3,715,890 | | 1964 | 3,630,894 | | 1963 | 3,547,889 | | 1962 | 3,466,293 | | 1961 | 3,387,611 | | 1960 | 3,319,796 |
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