| Year | Value | | 2022 | 8,515,799 | | 2021 | 8,283,874 | | 2020 | 7,737,129 | | 2019 | 6,930,915 | | 2018 | 6,124,903 | | 2017 | 5,556,472 | | 2016 | 5,366,008 | | 2015 | 5,667,012 | | 2014 | 6,351,647 | | 2013 | 7,212,111 | | 2012 | 8,014,113 | | 2011 | 8,406,203 | | 2010 | 8,368,382 | | 2009 | 8,033,022 | | 2008 | 7,474,094 | | 2007 | 6,936,160 | | 2006 | 6,604,459 | | 2005 | 6,568,342 | | 2004 | 6,803,908 | | 2003 | 7,216,042 | | 2002 | 7,559,240 | | 2001 | 7,761,675 | | 2000 | 7,830,601 | | 1999 | 7,754,191 | | 1998 | 7,564,219 | | 1997 | 7,237,567 | | 1996 | 6,817,040 | | 1995 | 6,330,087 | | 1994 | 5,858,030 | | 1993 | 5,449,452 | | 1992 | 5,083,245 | | 1991 | 4,803,791 | | 1990 | 4,732,859 | | 1989 | 4,893,403 | | 1988 | 5,122,953 | | 1987 | 5,477,713 | | 1986 | 5,911,809 | | 1985 | 6,189,548 | | 1984 | 6,229,661 | | 1983 | 6,127,588 | | 1982 | 5,976,564 | | 1981 | 5,794,484 | | 1980 | 5,647,934 | | 1979 | 5,515,862 | | 1978 | 5,391,410 | | 1977 | 5,259,425 | | 1976 | 5,125,785 | | 1975 | 4,974,430 | | 1974 | 4,789,779 | | 1973 | 4,553,519 | | 1972 | 4,311,192 | | 1971 | 4,077,371 | | 1970 | 3,862,002 | | 1969 | 3,697,533 | | 1968 | 3,561,639 | | 1967 | 3,446,332 | | 1966 | 3,322,543 | | 1965 | 3,199,721 | | 1964 | 3,083,371 | | 1963 | 3,045,426 | | 1962 | 3,023,969 | | 1961 | 2,965,448 | | 1960 | 2,912,919 |
|