| Year | Value | | 2019 | 6,256,951 | | 2018 | 6,180,950 | | 2017 | 6,098,122 | | 2016 | 6,013,650 | | 2015 | 5,933,924 | | 2014 | 5,860,546 | | 2013 | 5,792,131 | | 2012 | 5,727,275 | | 2011 | 5,662,950 | | 2010 | 5,600,648 | | 2009 | 5,541,148 | | 2008 | 5,479,974 | | 2007 | 5,417,823 | | 2006 | 5,355,641 | | 2005 | 5,293,779 | | 2004 | 5,232,706 | | 2003 | 5,171,926 | | 2002 | 5,110,442 | | 2001 | 5,062,679 | | 2000 | 5,034,533 | | 1999 | 5,002,228 | | 1998 | 4,965,867 | | 1997 | 4,925,791 | | 1996 | 4,882,915 | | 1995 | 4,837,991 | | 1994 | 4,790,972 | | 1993 | 4,741,930 | | 1992 | 4,690,878 | | 1991 | 4,638,364 | | 1990 | 4,594,712 | | 1989 | 4,564,486 | | 1988 | 4,531,857 | | 1987 | 4,497,506 | | 1986 | 4,461,038 | | 1985 | 4,422,901 | | 1984 | 4,382,997 | | 1983 | 4,341,793 | | 1982 | 4,304,098 | | 1981 | 4,271,960 | | 1980 | 4,237,384 | | 1979 | 4,200,752 | | 1978 | 4,161,878 | | 1977 | 4,120,783 | | 1976 | 4,077,200 | | 1975 | 4,031,324 | | 1974 | 3,982,844 | | 1973 | 3,909,901 | | 1972 | 3,834,996 | | 1971 | 3,760,133 | | 1970 | 3,685,446 | | 1969 | 3,611,266 | | 1968 | 3,537,475 | | 1967 | 3,464,666 | | 1966 | 3,392,889 | | 1965 | 3,322,584 | | 1964 | 3,253,852 | | 1963 | 3,186,850 | | 1962 | 3,123,095 | | 1961 | 3,063,172 | | 1960 | 3,004,363 |
|