Year | Value | 2022 | 30,020,115 | 2021 | 29,406,434 | 2020 | 28,773,881 | 2019 | 28,128,529 | 2018 | 27,449,745 | 2017 | 26,698,171 | 2016 | 25,941,285 | 2015 | 25,233,439 | 2014 | 24,537,222 | 2013 | 23,931,299 | 2012 | 23,435,408 | 2011 | 22,989,899 | 2010 | 22,575,727 | 2009 | 22,077,570 | 2008 | 21,509,684 | 2007 | 20,939,875 | 2006 | 20,379,811 | 2005 | 19,863,084 | 2004 | 19,401,615 | 2003 | 18,984,148 | 2002 | 18,582,119 | 2001 | 18,176,461 | 2000 | 17,752,987 | 1999 | 17,317,927 | 1998 | 16,922,204 | 1997 | 16,546,562 | 1996 | 16,158,567 | 1995 | 15,783,575 | 1994 | 15,397,830 | 1993 | 15,042,863 | 1992 | 15,005,807 | 1991 | 15,051,924 | 1990 | 15,056,784 | 1989 | 15,039,711 | 1988 | 15,085,919 | 1987 | 15,151,252 | 1986 | 15,113,469 | 1985 | 15,040,537 | 1984 | 14,967,944 | 1983 | 14,818,403 | 1982 | 14,434,741 | 1981 | 13,894,578 | 1980 | 13,345,705 | 1979 | 12,818,040 | 1978 | 12,313,980 | 1977 | 11,829,991 | 1976 | 11,373,351 | 1975 | 10,940,703 | 1974 | 10,523,434 | 1973 | 10,156,731 | 1972 | 9,894,067 | 1971 | 9,659,533 | 1970 | 9,437,247 | 1969 | 9,228,230 | 1968 | 9,022,106 | 1967 | 8,817,113 | 1966 | 8,616,580 | 1965 | 8,413,894 | 1964 | 8,201,892 | 1963 | 7,997,399 | 1962 | 7,803,630 | 1961 | 7,614,066 | 1960 | 7,431,700 |
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