| Year | Value | | 2022 | 7,890,574 | | 2021 | 8,194,439 | | 2020 | 8,148,040 | | 2019 | 7,898,969 | | 2018 | 7,527,329 | | 2017 | 7,122,121 | | 2016 | 6,779,664 | | 2015 | 6,572,675 | | 2014 | 6,498,855 | | 2013 | 6,515,335 | | 2012 | 6,475,151 | | 2011 | 6,362,474 | | 2010 | 6,188,949 | | 2009 | 5,952,335 | | 2008 | 5,667,501 | | 2007 | 5,363,438 | | 2006 | 5,075,168 | | 2005 | 4,801,767 | | 2004 | 4,555,343 | | 2003 | 4,355,522 | | 2002 | 4,252,159 | | 2001 | 4,244,019 | | 2000 | 4,306,591 | | 1999 | 4,397,864 | | 1998 | 4,468,996 | | 1997 | 4,597,922 | | 1996 | 4,790,105 | | 1995 | 4,922,702 | | 1994 | 4,927,549 | | 1993 | 4,841,504 | | 1992 | 4,694,902 | | 1991 | 4,524,949 | | 1990 | 4,367,938 | | 1989 | 4,210,861 | | 1988 | 4,070,484 | | 1987 | 3,935,626 | | 1986 | 3,792,303 | | 1985 | 3,662,769 | | 1984 | 3,543,205 | | 1983 | 3,405,478 | | 1982 | 3,259,448 | | 1981 | 3,122,783 | | 1980 | 2,988,108 | | 1979 | 2,865,819 | | 1978 | 2,775,056 | | 1977 | 2,699,672 | | 1976 | 2,629,784 | | 1975 | 2,559,526 | | 1974 | 2,484,937 | | 1973 | 2,420,526 | | 1972 | 2,370,942 | | 1971 | 2,321,966 | | 1970 | 2,266,600 | | 1969 | 2,201,727 | | 1968 | 2,115,430 | | 1967 | 2,014,359 | | 1966 | 1,919,934 | | 1965 | 1,833,369 | | 1964 | 1,741,409 | | 1963 | 1,656,299 | | 1962 | 1,592,718 | | 1961 | 1,537,397 | | 1960 | 1,473,290 |
|