| Year | Value | | 2022 | 13,922,522 | | 2021 | 13,564,231 | | 2020 | 13,210,626 | | 2019 | 12,855,489 | | 2018 | 12,501,234 | | 2017 | 12,157,838 | | 2016 | 11,814,923 | | 2015 | 11,463,852 | | 2014 | 11,106,213 | | 2013 | 10,771,471 | | 2012 | 10,469,879 | | 2011 | 10,176,648 | | 2010 | 9,890,121 | | 2009 | 9,609,692 | | 2008 | 9,337,569 | | 2007 | 9,073,988 | | 2006 | 8,822,729 | | 2005 | 8,583,601 | | 2004 | 8,349,841 | | 2003 | 8,121,554 | | 2002 | 7,900,648 | | 2001 | 7,689,826 | | 2000 | 7,488,888 | | 1999 | 7,292,705 | | 1998 | 7,100,689 | | 1997 | 6,914,047 | | 1996 | 6,731,150 | | 1995 | 6,549,266 | | 1994 | 6,367,688 | | 1993 | 6,186,192 | | 1992 | 6,006,615 | | 1991 | 5,830,693 | | 1990 | 5,656,408 | | 1989 | 5,484,873 | | 1988 | 5,319,025 | | 1987 | 5,155,068 | | 1986 | 4,993,128 | | 1985 | 4,837,406 | | 1984 | 4,688,249 | | 1983 | 4,553,171 | | 1982 | 4,455,258 | | 1981 | 4,345,373 | | 1980 | 4,190,110 | | 1979 | 4,051,326 | | 1978 | 3,935,784 | | 1977 | 3,827,034 | | 1976 | 3,727,081 | | 1975 | 3,626,163 | | 1974 | 3,524,086 | | 1973 | 3,425,369 | | 1972 | 3,330,064 | | 1971 | 3,238,255 | | 1970 | 3,150,133 | | 1969 | 3,066,015 | | 1968 | 2,985,727 | | 1967 | 2,908,926 | | 1966 | 2,835,441 | | 1965 | 2,764,995 | | 1964 | 2,697,379 | | 1963 | 2,632,409 | | 1962 | 2,570,050 | | 1961 | 2,524,477 | | 1960 | 2,496,189 |
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