Year | Value | 2022 | 12,070,519 | 2021 | 12,482,302 | 2020 | 12,662,060 | 2019 | 12,950,769 | 2018 | 13,273,310 | 2017 | 13,658,199 | 2016 | 14,124,425 | 2015 | 14,648,831 | 2014 | 15,207,248 | 2013 | 15,774,217 | 2012 | 16,318,154 | 2011 | 16,745,637 | 2010 | 16,958,816 | 2009 | 16,989,853 | 2008 | 16,959,074 | 2007 | 16,817,178 | 2006 | 16,560,181 | 2005 | 16,316,306 | 2004 | 16,080,216 | 2003 | 15,758,149 | 2002 | 15,423,109 | 2001 | 15,190,521 | 2000 | 15,018,866 | 1999 | 14,860,381 | 1998 | 14,731,986 | 1997 | 14,624,082 | 1996 | 14,501,453 | 1995 | 14,350,095 | 1994 | 14,220,075 | 1993 | 14,124,361 | 1992 | 13,997,442 | 1991 | 13,849,614 | 1990 | 13,801,412 | 1989 | 13,877,120 | 1988 | 14,056,501 | 1987 | 14,353,432 | 1986 | 14,745,830 | 1985 | 15,127,557 | 1984 | 15,423,306 | 1983 | 15,560,349 | 1982 | 15,551,588 | 1981 | 15,391,314 | 1980 | 15,100,287 | 1979 | 14,795,120 | 1978 | 14,483,978 | 1977 | 14,129,466 | 1976 | 13,831,741 | 1975 | 13,585,475 | 1974 | 13,348,895 | 1973 | 13,032,237 | 1972 | 12,639,210 | 1971 | 12,191,682 | 1970 | 11,378,565 | 1969 | 10,173,234 | 1968 | 9,016,231 | 1967 | 8,222,393 | 1966 | 7,972,465 | 1965 | 8,409,901 | 1964 | 9,372,797 | 1963 | 10,613,984 | 1962 | 11,797,107 | 1961 | 12,445,616 | 1960 | 12,520,379 |
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