| Year | Value | | 2022 | 3,961,508 | | 2021 | 3,994,078 | | 2020 | 4,028,025 | | 2019 | 4,040,585 | | 2018 | 4,009,595 | | 2017 | 3,976,575 | | 2016 | 3,945,594 | | 2015 | 3,915,630 | | 2014 | 3,871,591 | | 2013 | 3,833,872 | | 2012 | 3,808,534 | | 2011 | 3,756,104 | | 2010 | 3,717,750 | | 2009 | 3,676,363 | | 2008 | 3,654,659 | | 2007 | 3,619,281 | | 2006 | 3,574,074 | | 2005 | 3,535,501 | | 2004 | 3,503,605 | | 2003 | 3,459,990 | | 2002 | 3,450,535 | | 2001 | 3,419,501 | | 2000 | 3,380,202 | | 1999 | 3,337,520 | | 1998 | 3,292,744 | | 1997 | 3,252,163 | | 1996 | 3,212,399 | | 1995 | 3,063,467 | | 1994 | 2,996,040 | | 1993 | 2,921,794 | | 1992 | 2,864,321 | | 1991 | 2,832,323 | | 1990 | 2,800,945 | | 1989 | 2,783,751 | | 1988 | 2,746,490 | | 1987 | 2,714,686 | | 1986 | 2,678,725 | | 1985 | 2,637,378 | | 1984 | 2,601,403 | | 1983 | 2,567,470 | | 1982 | 2,519,478 | | 1981 | 2,472,666 | | 1980 | 2,415,565 | | 1979 | 2,358,797 | | 1978 | 2,239,766 | | 1977 | 2,205,955 | | 1976 | 2,180,916 | | 1975 | 2,160,404 | | 1974 | 2,126,387 | | 1973 | 2,066,529 | | 1972 | 2,015,257 | | 1971 | 1,982,461 | | 1970 | 1,941,477 | | 1969 | 1,892,829 | | 1968 | 1,860,926 | | 1967 | 1,819,896 | | 1966 | 1,772,431 | | 1965 | 1,754,559 | | 1964 | 1,706,635 | | 1963 | 1,663,385 | | 1962 | 1,604,717 | | 1961 | 1,536,078 | | 1960 | 1,509,281 |
|