Year | Value | 2022 | 52,738,980 | 2021 | 51,391,562 | 2020 | 50,129,591 | 2019 | 49,162,991 | 2018 | 48,300,674 | 2017 | 46,830,814 | 2016 | 45,465,994 | 2015 | 45,264,321 | 2014 | 46,192,327 | 2013 | 48,450,237 | 2012 | 51,495,890 | 2011 | 54,574,085 | 2010 | 57,708,226 | 2009 | 60,306,557 | 2008 | 61,920,235 | 2007 | 62,219,627 | 2006 | 61,585,061 | 2005 | 60,843,394 | 2004 | 60,010,986 | 2003 | 59,802,508 | 2002 | 59,627,237 | 2001 | 56,587,522 | 2000 | 51,181,915 | 1999 | 45,891,706 | 1998 | 40,821,136 | 1997 | 37,845,573 | 1996 | 38,496,441 | 1995 | 40,896,430 | 1994 | 43,259,315 | 1993 | 44,509,187 | 1992 | 44,383,280 | 1991 | 43,666,487 | 1990 | 42,569,735 | 1989 | 40,824,378 | 1988 | 38,642,374 | 1987 | 35,998,895 | 1986 | 33,322,687 | 1985 | 30,900,957 | 1984 | 28,652,081 | 1983 | 26,837,093 | 1982 | 25,376,990 | 1981 | 24,385,747 | 1980 | 23,734,977 | 1979 | 23,246,349 | 1978 | 22,914,223 | 1977 | 22,755,965 | 1976 | 22,637,116 | 1975 | 22,616,212 | 1974 | 22,773,674 | 1973 | 22,942,993 | 1972 | 22,890,050 | 1971 | 22,540,914 | 1970 | 22,037,106 | 1969 | 21,513,850 | 1968 | 20,975,993 | 1967 | 20,489,138 | 1966 | 20,041,937 | 1965 | 19,639,721 | 1964 | 19,458,361 | 1963 | 19,318,961 | 1962 | 19,040,249 | 1961 | 18,939,809 | 1960 | 18,998,311 |
|