| Year | Value | | 2022 | 6,252,585 | | 2021 | 6,070,299 | | 2020 | 5,928,810 | | 2019 | 5,825,739 | | 2018 | 5,662,080 | | 2017 | 5,504,090 | | 2016 | 5,401,738 | | 2015 | 5,303,448 | | 2014 | 5,214,053 | | 2013 | 5,148,364 | | 2012 | 5,094,408 | | 2011 | 5,045,394 | | 2010 | 4,992,476 | | 2009 | 4,921,471 | | 2008 | 4,827,710 | | 2007 | 4,731,183 | | 2006 | 4,657,431 | | 2005 | 4,637,883 | | 2004 | 4,697,027 | | 2003 | 4,876,509 | | 2002 | 5,139,448 | | 2001 | 5,438,213 | | 2000 | 5,764,828 | | 1999 | 6,058,140 | | 1998 | 6,242,963 | | 1997 | 6,344,288 | | 1996 | 6,368,771 | | 1995 | 6,326,555 | | 1994 | 6,292,570 | | 1993 | 6,245,868 | | 1992 | 6,173,436 | | 1991 | 6,107,311 | | 1990 | 6,002,609 | | 1989 | 5,891,916 | | 1988 | 5,742,950 | | 1987 | 5,544,991 | | 1986 | 5,309,803 | | 1985 | 4,902,768 | | 1984 | 4,261,360 | | 1983 | 3,605,862 | | 1982 | 3,106,947 | | 1981 | 2,918,651 | | 1980 | 3,165,823 | | 1979 | 3,759,209 | | 1978 | 4,537,354 | | 1977 | 5,291,307 | | 1976 | 5,675,295 | | 1975 | 5,676,580 | | 1974 | 5,441,709 | | 1973 | 5,030,153 | | 1972 | 4,668,350 | | 1971 | 4,473,353 | | 1970 | 4,520,884 | | 1969 | 4,791,176 | | 1968 | 5,168,930 | | 1967 | 5,450,077 | | 1966 | 5,548,107 | | 1965 | 5,408,189 | | 1964 | 5,034,411 | | 1963 | 4,534,339 | | 1962 | 3,948,818 | | 1961 | 3,385,871 | | 1960 | 2,935,668 |
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