| Year | Value | | 2022 | 3,446,758 | | 2021 | 3,378,317 | | 2020 | 3,387,165 | | 2019 | 3,457,944 | | 2018 | 3,552,832 | | 2017 | 3,710,988 | | 2016 | 3,965,944 | | 2015 | 4,303,151 | | 2014 | 4,700,626 | | 2013 | 5,122,408 | | 2012 | 5,527,948 | | 2011 | 5,849,277 | | 2010 | 6,036,631 | | 2009 | 6,119,527 | | 2008 | 6,172,516 | | 2007 | 6,155,531 | | 2006 | 6,063,267 | | 2005 | 6,000,276 | | 2004 | 5,934,385 | | 2003 | 5,797,756 | | 2002 | 5,640,728 | | 2001 | 5,528,380 | | 2000 | 5,446,103 | | 1999 | 5,378,592 | | 1998 | 5,308,781 | | 1997 | 5,242,780 | | 1996 | 5,175,941 | | 1995 | 5,071,548 | | 1994 | 4,937,090 | | 1993 | 4,804,063 | | 1992 | 4,685,431 | | 1991 | 4,618,255 | | 1990 | 4,638,672 | | 1989 | 4,749,944 | | 1988 | 4,942,237 | | 1987 | 5,205,305 | | 1986 | 5,504,057 | | 1985 | 5,811,759 | | 1984 | 6,077,142 | | 1983 | 6,261,237 | | 1982 | 6,358,656 | | 1981 | 6,370,344 | | 1980 | 6,350,040 | | 1979 | 6,351,700 | | 1978 | 6,315,099 | | 1977 | 6,222,400 | | 1976 | 6,138,688 | | 1975 | 6,030,800 | | 1974 | 5,919,019 | | 1973 | 5,801,636 | | 1972 | 5,658,816 | | 1971 | 5,482,233 | | 1970 | 5,069,783 | | 1969 | 4,388,909 | | 1968 | 3,700,975 | | 1967 | 3,192,430 | | 1966 | 3,046,758 | | 1965 | 3,375,869 | | 1964 | 4,058,245 | | 1963 | 4,934,876 | | 1962 | 5,737,664 | | 1961 | 6,135,893 | | 1960 | 6,144,255 |
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