| Year | Value | | 2022 | 12,913,005 | | 2021 | 12,750,753 | | 2020 | 12,727,887 | | 2019 | 12,567,835 | | 2018 | 12,382,224 | | 2017 | 12,199,874 | | 2016 | 12,005,262 | | 2015 | 11,827,651 | | 2014 | 11,668,610 | | 2013 | 11,504,523 | | 2012 | 11,312,918 | | 2011 | 11,119,039 | | 2010 | 10,967,548 | | 2009 | 10,797,546 | | 2008 | 10,570,891 | | 2007 | 10,352,205 | | 2006 | 10,158,068 | | 2005 | 10,017,910 | | 2004 | 9,894,184 | | 2003 | 9,787,220 | | 2002 | 9,673,988 | | 2001 | 9,563,615 | | 2000 | 9,443,035 | | 1999 | 9,339,151 | | 1998 | 9,241,838 | | 1997 | 9,155,427 | | 1996 | 9,062,811 | | 1995 | 8,958,307 | | 1994 | 8,862,401 | | 1993 | 8,780,847 | | 1992 | 8,707,078 | | 1991 | 8,614,731 | | 1990 | 8,510,043 | | 1989 | 8,387,772 | | 1988 | 8,249,470 | | 1987 | 8,119,214 | | 1986 | 7,999,185 | | 1985 | 7,883,844 | | 1984 | 7,778,465 | | 1983 | 7,685,480 | | 1982 | 7,579,934 | | 1981 | 7,448,959 | | 1980 | 7,335,839 | | 1979 | 7,251,825 | | 1978 | 7,179,733 | | 1977 | 7,103,359 | | 1976 | 7,030,648 | | 1975 | 6,967,121 | | 1974 | 6,887,192 | | 1973 | 6,718,367 | | 1972 | 6,618,916 | | 1971 | 6,501,340 | | 1970 | 6,288,760 | | 1969 | 6,168,475 | | 1968 | 6,042,010 | | 1967 | 5,938,043 | | 1966 | 5,865,981 | | 1965 | 5,735,918 | | 1964 | 5,626,621 | | 1963 | 5,519,968 | | 1962 | 5,420,102 | | 1961 | 5,294,827 | | 1960 | 5,191,737 |
|