| Year | Value | | 2022 | 3,790,272 | | 2021 | 3,871,714 | | 2020 | 3,894,281 | | 2019 | 3,907,389 | | 2018 | 3,916,682 | | 2017 | 3,927,608 | | 2016 | 3,939,250 | | 2015 | 3,951,845 | | 2014 | 3,963,388 | | 2013 | 3,973,872 | | 2012 | 3,985,121 | | 2011 | 3,994,308 | | 2010 | 4,009,779 | | 2009 | 4,009,752 | | 2008 | 4,009,546 | | 2007 | 4,010,264 | | 2006 | 4,010,029 | | 2005 | 4,009,310 | | 2004 | 4,004,805 | | 2003 | 3,997,403 | | 2002 | 3,989,274 | | 2001 | 3,976,219 | | 2000 | 3,966,301 | | 1999 | 3,962,104 | | 1998 | 3,959,596 | | 1997 | 3,957,625 | | 1996 | 3,951,731 | | 1995 | 3,938,573 | | 1994 | 3,977,770 | | 1993 | 3,942,353 | | 1992 | 3,898,223 | | 1991 | 3,855,241 | | 1990 | 3,822,813 | | 1989 | 3,789,135 | | 1988 | 3,753,668 | | 1987 | 3,715,588 | | 1986 | 3,673,875 | | 1985 | 3,627,509 | | 1984 | 3,589,627 | | 1983 | 3,548,868 | | 1982 | 3,505,133 | | 1981 | 3,458,357 | | 1980 | 3,397,269 | | 1979 | 3,338,919 | | 1978 | 3,278,834 | | 1977 | 3,217,471 | | 1976 | 3,154,610 | | 1975 | 3,089,259 | | 1974 | 3,031,538 | | 1973 | 2,973,469 | | 1972 | 2,915,781 | | 1971 | 2,857,727 | | 1970 | 2,770,952 | | 1969 | 2,681,395 | | 1968 | 2,592,295 | | 1967 | 2,502,738 | | 1966 | 2,413,642 | | 1965 | 2,323,684 | | 1964 | 2,241,921 | | 1963 | 2,160,366 | | 1962 | 2,079,912 | | 1961 | 1,999,961 | | 1960 | 1,920,549 |
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