Year | Value | 2022 | 14,988,474 | 2021 | 14,971,083 | 2020 | 14,745,785 | 2019 | 14,530,425 | 2018 | 14,359,347 | 2017 | 14,205,153 | 2016 | 14,000,213 | 2015 | 13,836,441 | 2014 | 13,776,308 | 2013 | 13,808,006 | 2012 | 13,938,221 | 2011 | 14,225,548 | 2010 | 14,585,717 | 2009 | 14,895,518 | 2008 | 15,060,499 | 2007 | 15,137,936 | 2006 | 15,120,200 | 2005 | 14,948,208 | 2004 | 14,765,601 | 2003 | 14,603,297 | 2002 | 14,375,501 | 2001 | 14,137,588 | 2000 | 13,934,725 | 1999 | 13,749,425 | 1998 | 13,467,787 | 1997 | 13,076,598 | 1996 | 12,602,770 | 1995 | 11,791,762 | 1994 | 10,656,274 | 1993 | 9,564,920 | 1992 | 8,784,066 | 1991 | 8,521,997 | 1990 | 8,921,210 | 1989 | 9,832,600 | 1988 | 10,958,605 | 1987 | 12,029,580 | 1986 | 12,625,018 | 1985 | 12,712,863 | 1984 | 12,428,154 | 1983 | 11,845,930 | 1982 | 11,276,791 | 1981 | 10,920,221 | 1980 | 10,895,923 | 1979 | 11,203,813 | 1978 | 11,702,386 | 1977 | 12,079,057 | 1976 | 12,160,446 | 1975 | 11,894,402 | 1974 | 11,305,583 | 1973 | 10,513,234 | 1972 | 9,586,401 | 1971 | 8,663,574 | 1970 | 7,837,946 | 1969 | 7,138,024 | 1968 | 6,598,689 | 1967 | 6,137,219 | 1966 | 5,755,002 | 1965 | 5,583,982 | 1964 | 5,661,312 | 1963 | 5,876,752 | 1962 | 6,233,093 | 1961 | 6,667,556 | 1960 | 7,007,990 |
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