| Year | Value | | 2022 | 2,421,460 | | 2021 | 2,476,312 | | 2020 | 2,511,605 | | 2019 | 2,519,344 | | 2018 | 2,511,878 | | 2017 | 2,497,441 | | 2016 | 2,493,280 | | 2015 | 2,512,056 | | 2014 | 2,557,752 | | 2013 | 2,618,269 | | 2012 | 2,664,094 | | 2011 | 2,681,537 | | 2010 | 2,668,723 | | 2009 | 2,621,828 | | 2008 | 2,551,974 | | 2007 | 2,496,029 | | 2006 | 2,463,810 | | 2005 | 2,453,719 | | 2004 | 2,465,923 | | 2003 | 2,492,486 | | 2002 | 2,530,360 | | 2001 | 2,587,226 | | 2000 | 2,652,292 | | 1999 | 2,729,584 | | 1998 | 2,822,191 | | 1997 | 2,933,080 | | 1996 | 3,060,483 | | 1995 | 3,204,886 | | 1994 | 3,355,842 | | 1993 | 3,495,877 | | 1992 | 3,628,966 | | 1991 | 3,761,825 | | 1990 | 3,880,028 | | 1989 | 3,973,217 | | 1988 | 4,050,821 | | 1987 | 4,111,632 | | 1986 | 4,153,684 | | 1985 | 4,196,776 | | 1984 | 4,250,110 | | 1983 | 4,303,529 | | 1982 | 4,353,059 | | 1981 | 4,411,879 | | 1980 | 4,466,525 | | 1979 | 4,493,235 | | 1978 | 4,480,460 | | 1977 | 4,425,284 | | 1976 | 4,328,654 | | 1975 | 4,206,707 | | 1974 | 4,089,401 | | 1973 | 4,004,784 | | 1972 | 3,943,021 | | 1971 | 3,851,045 | | 1970 | 3,763,859 | | 1969 | 3,707,301 | | 1968 | 3,665,935 | | 1967 | 3,654,448 | | 1966 | 3,686,848 | | 1965 | 3,767,498 | | 1964 | 3,868,199 | | 1963 | 3,979,793 | | 1962 | 4,117,422 | | 1961 | 4,269,232 | | 1960 | 4,412,302 |
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