Year | Value | 2022 | 36,704,066 | 2021 | 37,275,056 | 2020 | 37,890,563 | 2019 | 38,761,659 | 2018 | 40,033,399 | 2017 | 41,513,439 | 2016 | 43,313,510 | 2015 | 46,401,190 | 2014 | 50,214,498 | 2013 | 53,371,813 | 2012 | 56,286,004 | 2011 | 58,592,956 | 2010 | 58,650,540 | 2009 | 57,079,124 | 2008 | 55,357,936 | 2007 | 53,852,874 | 2006 | 52,565,858 | 2005 | 51,366,078 | 2004 | 50,445,907 | 2003 | 49,618,335 | 2002 | 48,149,749 | 2001 | 46,790,330 | 2000 | 46,606,485 | 1999 | 47,540,974 | 1998 | 49,785,281 | 1997 | 52,793,020 | 1996 | 55,819,532 | 1995 | 58,855,857 | 1994 | 61,294,026 | 1993 | 62,746,585 | 1992 | 62,940,431 | 1991 | 62,240,666 | 1990 | 61,560,411 | 1989 | 60,879,475 | 1988 | 60,764,071 | 1987 | 60,667,342 | 1986 | 57,701,195 | 1985 | 52,326,891 | 1984 | 47,072,887 | 1983 | 42,033,796 | 1982 | 39,112,410 | 1981 | 39,911,844 | 1980 | 42,539,831 | 1979 | 45,131,926 | 1978 | 46,509,864 | 1977 | 46,415,659 | 1976 | 45,723,242 | 1975 | 44,543,250 | 1974 | 42,642,729 | 1973 | 40,338,258 | 1972 | 37,562,678 | 1971 | 34,740,649 | 1970 | 32,164,502 | 1969 | 29,797,654 | 1968 | 27,908,405 | 1967 | 26,389,188 | 1966 | 25,333,611 | 1965 | 24,617,505 | 1964 | 24,207,803 | 1963 | 24,085,941 | 1962 | 24,098,068 | 1961 | 24,201,865 | 1960 | 24,598,001 |
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