| Year | Value | | 2022 | 3,627,644 | | 2021 | 3,675,881 | | 2020 | 3,721,233 | | 2019 | 3,767,283 | | 2018 | 3,822,538 | | 2017 | 3,883,798 | | 2016 | 3,952,730 | | 2015 | 4,008,761 | | 2014 | 4,033,588 | | 2013 | 4,016,523 | | 2012 | 3,958,177 | | 2011 | 3,876,097 | | 2010 | 3,791,790 | | 2009 | 3,726,885 | | 2008 | 3,697,607 | | 2007 | 3,707,209 | | 2006 | 3,681,163 | | 2005 | 3,613,740 | | 2004 | 3,552,816 | | 2003 | 3,493,692 | | 2002 | 3,437,356 | | 2001 | 3,458,377 | | 2000 | 3,556,009 | | 1999 | 3,663,723 | | 1998 | 3,770,443 | | 1997 | 3,903,406 | | 1996 | 4,049,521 | | 1995 | 4,186,444 | | 1994 | 4,297,948 | | 1993 | 4,363,037 | | 1992 | 4,389,338 | | 1991 | 4,395,336 | | 1990 | 4,375,860 | | 1989 | 4,339,903 | | 1988 | 4,292,364 | | 1987 | 4,215,636 | | 1986 | 4,105,949 | | 1985 | 3,920,262 | | 1984 | 3,695,809 | | 1983 | 3,494,283 | | 1982 | 3,318,963 | | 1981 | 3,196,186 | | 1980 | 3,175,341 | | 1979 | 3,222,765 | | 1978 | 3,275,419 | | 1977 | 3,335,693 | | 1976 | 3,391,812 | | 1975 | 3,429,283 | | 1974 | 3,447,804 | | 1973 | 3,466,484 | | 1972 | 3,497,432 | | 1971 | 3,531,718 | | 1970 | 3,575,567 | | 1969 | 3,620,205 | | 1968 | 3,649,886 | | 1967 | 3,656,674 | | 1966 | 3,648,874 | | 1965 | 3,655,911 | | 1964 | 3,659,025 | | 1963 | 3,649,372 | | 1962 | 3,634,864 | | 1961 | 3,587,418 | | 1960 | 3,482,256 |
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