Year | Value | 2022 | 23,824,536 | 2021 | 24,084,069 | 2020 | 24,384,221 | 2019 | 24,689,097 | 2018 | 24,890,020 | 2017 | 24,958,381 | 2016 | 24,899,315 | 2015 | 24,647,008 | 2014 | 24,167,496 | 2013 | 23,546,198 | 2012 | 22,886,003 | 2011 | 22,235,415 | 2010 | 21,597,341 | 2009 | 21,003,007 | 2008 | 20,456,780 | 2007 | 19,980,155 | 2006 | 19,611,488 | 2005 | 19,302,942 | 2004 | 19,028,740 | 2003 | 18,811,437 | 2002 | 18,659,398 | 2001 | 18,555,369 | 2000 | 18,510,273 | 1999 | 18,558,172 | 1998 | 18,705,740 | 1997 | 18,945,922 | 1996 | 19,233,291 | 1995 | 19,478,992 | 1994 | 19,638,687 | 1993 | 19,729,560 | 1992 | 19,769,798 | 1991 | 19,767,462 | 1990 | 19,775,435 | 1989 | 19,565,078 | 1988 | 19,422,401 | 1987 | 19,186,772 | 1986 | 18,833,183 | 1985 | 18,390,176 | 1984 | 17,894,182 | 1983 | 17,338,566 | 1982 | 16,751,097 | 1981 | 16,169,283 | 1980 | 15,608,353 | 1979 | 15,070,715 | 1978 | 14,593,840 | 1977 | 14,167,000 | 1976 | 13,711,561 | 1975 | 13,260,814 | 1974 | 12,890,789 | 1973 | 12,582,969 | 1972 | 12,288,907 | 1971 | 11,996,322 | 1970 | 11,700,218 | 1969 | 11,411,291 | 1968 | 11,137,182 | 1967 | 10,873,987 | 1966 | 10,600,968 | 1965 | 10,322,339 | 1964 | 10,042,234 | 1963 | 9,757,826 | 1962 | 9,476,222 | 1961 | 9,226,291 | 1960 | 9,010,108 |
|