| Year | Value | | 2022 | 11,797,195 | | 2021 | 11,903,092 | | 2020 | 11,714,642 | | 2019 | 11,488,747 | | 2018 | 11,266,102 | | 2017 | 11,000,021 | | 2016 | 10,725,230 | | 2015 | 10,501,156 | | 2014 | 10,295,848 | | 2013 | 10,023,138 | | 2012 | 9,698,452 | | 2011 | 9,330,202 | | 2010 | 8,700,207 | | 2009 | 7,838,898 | | 2008 | 7,020,072 | | 2007 | 6,414,941 | | 2006 | 6,162,200 | | 2005 | 6,399,052 | | 2004 | 7,035,535 | | 2003 | 7,852,931 | | 2002 | 8,661,846 | | 2001 | 9,149,768 | | 2000 | 9,267,389 | | 1999 | 9,094,729 | | 1998 | 8,688,546 | | 1997 | 8,279,554 | | 1996 | 8,047,624 | | 1995 | 8,076,797 | | 1994 | 8,357,439 | | 1993 | 8,774,272 | | 1992 | 9,080,247 | | 1991 | 9,157,466 | | 1990 | 8,982,362 | | 1989 | 8,579,324 | | 1988 | 8,003,289 | | 1987 | 7,316,439 | | 1986 | 6,643,488 | | 1985 | 6,058,185 | | 1984 | 5,568,937 | | 1983 | 5,165,095 | | 1982 | 4,801,445 | | 1981 | 4,496,983 | | 1980 | 4,356,238 | | 1979 | 4,427,124 | | 1978 | 4,621,238 | | 1977 | 4,946,697 | | 1976 | 5,349,123 | | 1975 | 5,641,669 | | 1974 | 5,753,775 | | 1973 | 5,724,153 | | 1972 | 5,641,532 | | 1971 | 5,535,861 | | 1970 | 5,429,330 | | 1969 | 5,302,037 | | 1968 | 5,164,586 | | 1967 | 5,003,232 | | 1966 | 4,786,305 | | 1965 | 4,591,914 | | 1964 | 4,402,236 | | 1963 | 4,192,554 | | 1962 | 4,004,928 | | 1961 | 3,883,110 | | 1960 | 3,770,823 |
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