| Year | Value | | 2022 | 3,931,399 | | 2021 | 4,048,844 | | 2020 | 4,110,127 | | 2019 | 4,122,993 | | 2018 | 4,095,054 | | 2017 | 4,029,365 | | 2016 | 3,940,463 | | 2015 | 3,845,536 | | 2014 | 3,760,722 | | 2013 | 3,716,106 | | 2012 | 3,700,339 | | 2011 | 3,654,406 | | 2010 | 3,580,896 | | 2009 | 3,518,149 | | 2008 | 3,452,523 | | 2007 | 3,398,103 | | 2006 | 3,405,949 | | 2005 | 3,475,097 | | 2004 | 3,560,227 | | 2003 | 3,658,429 | | 2002 | 3,783,381 | | 2001 | 3,932,872 | | 2000 | 4,066,664 | | 1999 | 4,176,422 | | 1998 | 4,238,815 | | 1997 | 4,260,452 | | 1996 | 4,251,603 | | 1995 | 4,221,425 | | 1994 | 4,175,908 | | 1993 | 4,119,831 | | 1992 | 4,052,069 | | 1991 | 3,967,588 | | 1990 | 3,802,432 | | 1989 | 3,590,014 | | 1988 | 3,392,349 | | 1987 | 3,207,826 | | 1986 | 3,077,435 | | 1985 | 3,052,275 | | 1984 | 3,093,061 | | 1983 | 3,135,634 | | 1982 | 3,189,218 | | 1981 | 3,241,495 | | 1980 | 3,280,344 | | 1979 | 3,307,939 | | 1978 | 3,336,537 | | 1977 | 3,377,850 | | 1976 | 3,421,291 | | 1975 | 3,466,525 | | 1974 | 3,510,003 | | 1973 | 3,536,273 | | 1972 | 3,530,086 | | 1971 | 3,487,694 | | 1970 | 3,436,046 | | 1969 | 3,374,259 | | 1968 | 3,305,751 | | 1967 | 3,233,027 | | 1966 | 3,141,962 | | 1965 | 3,022,733 | | 1964 | 2,868,475 | | 1963 | 2,636,728 | | 1962 | 2,359,923 | | 1961 | 2,124,138 | | 1960 | 1,958,293 |
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