Year | Value | 2022 | 18,852,368 | 2021 | 18,665,663 | 2020 | 18,474,956 | 2019 | 18,281,786 | 2018 | 18,087,320 | 2017 | 17,881,446 | 2016 | 17,665,036 | 2015 | 17,444,602 | 2014 | 17,220,817 | 2013 | 16,990,792 | 2012 | 16,757,724 | 2011 | 16,525,679 | 2010 | 16,297,672 | 2009 | 16,077,493 | 2008 | 15,864,470 | 2007 | 15,654,951 | 2006 | 15,447,447 | 2005 | 15,240,243 | 2004 | 15,038,644 | 2003 | 14,850,814 | 2002 | 14,665,548 | 2001 | 14,473,530 | 2000 | 14,279,162 | 1999 | 14,083,998 | 1998 | 13,885,447 | 1997 | 13,682,841 | 1996 | 13,479,362 | 1995 | 13,275,721 | 1994 | 13,076,811 | 1993 | 12,882,331 | 1992 | 12,681,853 | 1991 | 12,477,850 | 1990 | 12,271,005 | 1989 | 12,060,876 | 1988 | 11,848,287 | 1987 | 11,628,974 | 1986 | 11,401,840 | 1985 | 11,156,439 | 1984 | 10,895,546 | 1983 | 10,627,894 | 1982 | 10,357,096 | 1981 | 10,089,330 | 1980 | 9,824,183 | 1979 | 9,568,317 | 1978 | 9,325,069 | 1977 | 9,089,391 | 1976 | 8,868,231 | 1975 | 8,658,599 | 1974 | 8,452,686 | 1973 | 8,251,888 | 1972 | 8,053,156 | 1971 | 7,852,383 | 1970 | 7,648,316 | 1969 | 7,446,910 | 1968 | 7,250,855 | 1967 | 7,058,131 | 1966 | 6,870,056 | 1965 | 6,689,578 | 1964 | 6,519,024 | 1963 | 6,359,011 | 1962 | 6,196,550 | 1961 | 6,033,311 | 1960 | 5,875,029 |
|