| Year | Value | | 2022 | 8,170,898 | | 2021 | 8,254,156 | | 2020 | 8,299,233 | | 2019 | 8,299,815 | | 2018 | 8,266,986 | | 2017 | 8,211,225 | | 2016 | 8,121,914 | | 2015 | 8,011,947 | | 2014 | 7,910,661 | | 2013 | 7,802,907 | | 2012 | 7,685,492 | | 2011 | 7,595,720 | | 2010 | 7,544,433 | | 2009 | 7,511,270 | | 2008 | 7,502,360 | | 2007 | 7,505,704 | | 2006 | 7,501,690 | | 2005 | 7,481,723 | | 2004 | 7,437,503 | | 2003 | 7,392,443 | | 2002 | 7,356,712 | | 2001 | 7,307,893 | | 2000 | 7,223,488 | | 1999 | 7,105,490 | | 1998 | 6,960,322 | | 1997 | 6,784,097 | | 1996 | 6,594,093 | | 1995 | 6,408,243 | | 1994 | 6,226,041 | | 1993 | 6,057,157 | | 1992 | 5,906,799 | | 1991 | 5,776,682 | | 1990 | 5,642,167 | | 1989 | 5,490,067 | | 1988 | 5,331,080 | | 1987 | 5,157,325 | | 1986 | 4,974,763 | | 1985 | 4,785,725 | | 1984 | 4,596,939 | | 1983 | 4,423,378 | | 1982 | 4,278,528 | | 1981 | 4,176,404 | | 1980 | 4,116,075 | | 1979 | 4,076,810 | | 1978 | 4,031,162 | | 1977 | 3,966,038 | | 1976 | 3,890,402 | | 1975 | 3,800,481 | | 1974 | 3,677,439 | | 1973 | 3,538,656 | | 1972 | 3,405,433 | | 1971 | 3,285,524 | | 1970 | 3,170,787 | | 1969 | 3,042,286 | | 1968 | 2,912,683 | | 1967 | 2,808,363 | | 1966 | 2,730,782 | | 1965 | 2,669,756 | | 1964 | 2,627,914 | | 1963 | 2,594,858 | | 1962 | 2,545,764 | | 1961 | 2,481,436 | | 1960 | 2,414,715 |
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