Year | Value | 2022 | 60,245,580 | 2021 | 59,520,396 | 2020 | 58,689,005 | 2019 | 57,792,143 | 2018 | 57,509,179 | 2017 | 57,300,778 | 2016 | 54,359,236 | 2015 | 49,159,312 | 2014 | 44,092,094 | 2013 | 39,247,356 | 2012 | 36,423,108 | 2011 | 37,114,946 | 2010 | 39,543,966 | 2009 | 41,976,200 | 2008 | 43,322,992 | 2007 | 43,282,370 | 2006 | 42,634,215 | 2005 | 41,521,265 | 2004 | 39,704,176 | 2003 | 37,491,630 | 2002 | 34,828,142 | 2001 | 32,122,098 | 2000 | 29,675,330 | 1999 | 27,399,224 | 1998 | 25,552,487 | 1997 | 24,052,871 | 1996 | 22,991,604 | 1995 | 22,246,187 | 1994 | 21,671,611 | 1993 | 21,281,585 | 1992 | 21,072,729 | 1991 | 20,892,356 | 1990 | 20,845,290 | 1989 | 20,988,370 | 1988 | 21,126,652 | 1987 | 21,065,404 | 1986 | 20,747,174 | 1985 | 20,302,501 | 1984 | 19,821,300 | 1983 | 19,301,181 | 1982 | 18,825,251 | 1981 | 18,407,914 | 1980 | 18,043,452 | 1979 | 17,778,275 | 1978 | 17,460,479 | 1977 | 17,054,611 | 1976 | 16,771,160 | 1975 | 16,486,978 | 1974 | 16,055,287 | 1973 | 15,595,065 | 1972 | 15,256,919 | 1971 | 14,999,260 | 1970 | 14,722,803 | 1969 | 14,530,825 | 1968 | 14,441,361 | 1967 | 14,239,804 | 1966 | 13,883,071 | 1965 | 13,539,360 | 1964 | 13,328,891 | 1963 | 13,206,171 | 1962 | 13,125,092 | 1961 | 13,212,412 | 1960 | 13,469,264 |
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