| Year | Value | | 2022 | 6,280,908 | | 2021 | 6,333,698 | | 2020 | 6,423,635 | | 2019 | 6,541,047 | | 2018 | 6,620,044 | | 2017 | 6,639,407 | | 2016 | 6,597,238 | | 2015 | 6,467,545 | | 2014 | 6,256,774 | | 2013 | 6,019,225 | | 2012 | 5,796,314 | | 2011 | 5,599,150 | | 2010 | 5,420,834 | | 2009 | 5,272,054 | | 2008 | 5,154,484 | | 2007 | 5,052,304 | | 2006 | 4,968,149 | | 2005 | 4,899,925 | | 2004 | 4,840,228 | | 2003 | 4,787,374 | | 2002 | 4,732,913 | | 2001 | 4,676,358 | | 2000 | 4,627,221 | | 1999 | 4,590,673 | | 1998 | 4,564,733 | | 1997 | 4,556,103 | | 1996 | 4,555,049 | | 1995 | 4,553,204 | | 1994 | 4,558,647 | | 1993 | 4,568,101 | | 1992 | 4,570,120 | | 1991 | 4,565,279 | | 1990 | 4,549,821 | | 1989 | 4,509,249 | | 1988 | 4,444,008 | | 1987 | 4,359,058 | | 1986 | 4,262,535 | | 1985 | 4,164,071 | | 1984 | 4,067,829 | | 1983 | 3,968,019 | | 1982 | 3,865,079 | | 1981 | 3,765,034 | | 1980 | 3,661,732 | | 1979 | 3,550,847 | | 1978 | 3,440,595 | | 1977 | 3,341,908 | | 1976 | 3,255,157 | | 1975 | 3,176,679 | | 1974 | 3,108,393 | | 1973 | 3,050,898 | | 1972 | 2,997,554 | | 1971 | 2,945,760 | | 1970 | 2,895,113 | | 1969 | 2,844,639 | | 1968 | 2,794,480 | | 1967 | 2,742,019 | | 1966 | 2,686,752 | | 1965 | 2,631,163 | | 1964 | 2,574,696 | | 1963 | 2,517,433 | | 1962 | 2,463,807 | | 1961 | 2,415,223 | | 1960 | 2,370,549 |
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