| Year | Value | | 2022 | 9,698,490 | | 2021 | 9,574,297 | | 2020 | 9,326,109 | | 2019 | 8,986,877 | | 2018 | 8,702,613 | | 2017 | 8,394,025 | | 2016 | 8,156,570 | | 2015 | 8,188,448 | | 2014 | 8,337,005 | | 2013 | 8,389,757 | | 2012 | 8,452,461 | | 2011 | 8,514,660 | | 2010 | 8,516,862 | | 2009 | 8,408,167 | | 2008 | 8,288,345 | | 2007 | 8,175,106 | | 2006 | 8,089,253 | | 2005 | 8,034,653 | | 2004 | 7,993,586 | | 2003 | 7,981,553 | | 2002 | 7,983,536 | | 2001 | 7,957,594 | | 2000 | 7,915,559 | | 1999 | 7,875,885 | | 1998 | 7,860,812 | | 1997 | 7,870,063 | | 1996 | 7,897,567 | | 1995 | 7,908,750 | | 1994 | 7,728,226 | | 1993 | 7,254,112 | | 1992 | 6,636,228 | | 1991 | 6,006,383 | | 1990 | 5,486,148 | | 1989 | 5,385,944 | | 1988 | 5,740,593 | | 1987 | 6,260,238 | | 1986 | 6,751,547 | | 1985 | 7,099,528 | | 1984 | 7,233,752 | | 1983 | 7,224,264 | | 1982 | 7,166,002 | | 1981 | 7,095,661 | | 1980 | 7,016,894 | | 1979 | 6,898,427 | | 1978 | 6,765,546 | | 1977 | 6,648,993 | | 1976 | 6,551,356 | | 1975 | 6,462,780 | | 1974 | 6,353,382 | | 1973 | 6,218,277 | | 1972 | 6,069,769 | | 1971 | 5,918,594 | | 1970 | 5,764,268 | | 1969 | 5,625,875 | | 1968 | 5,519,933 | | 1967 | 5,403,227 | | 1966 | 5,265,548 | | 1965 | 5,128,097 | | 1964 | 5,008,791 | | 1963 | 4,904,885 | | 1962 | 4,816,872 | | 1961 | 4,724,947 | | 1960 | 4,630,091 |
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