Year | Value | 2022 | 21,776,063 | 2021 | 21,521,471 | 2020 | 21,248,674 | 2019 | 21,015,317 | 2018 | 20,775,926 | 2017 | 20,524,819 | 2016 | 20,196,667 | 2015 | 19,435,237 | 2014 | 18,334,146 | 2013 | 17,267,896 | 2012 | 16,302,697 | 2011 | 15,652,135 | 2010 | 15,733,319 | 2009 | 16,252,501 | 2008 | 16,828,460 | 2007 | 17,427,683 | 2006 | 17,777,744 | 2005 | 17,732,683 | 2004 | 17,409,026 | 2003 | 16,905,259 | 2002 | 16,416,451 | 2001 | 16,108,351 | 2000 | 16,051,323 | 1999 | 16,201,597 | 1998 | 16,495,409 | 1997 | 16,727,572 | 1996 | 16,740,980 | 1995 | 16,516,246 | 1994 | 16,084,801 | 1993 | 15,515,546 | 1992 | 14,857,283 | 1991 | 14,250,915 | 1990 | 13,735,145 | 1989 | 13,156,565 | 1988 | 12,354,520 | 1987 | 11,447,300 | 1986 | 10,602,211 | 1985 | 9,990,358 | 1984 | 9,941,253 | 1983 | 10,471,205 | 1982 | 11,310,766 | 1981 | 12,170,857 | 1980 | 12,803,430 | 1979 | 13,083,969 | 1978 | 13,091,141 | 1977 | 13,001,672 | 1976 | 12,883,292 | 1975 | 12,741,085 | 1974 | 12,561,322 | 1973 | 12,375,084 | 1972 | 12,175,103 | 1971 | 11,947,406 | 1970 | 11,713,821 | 1969 | 11,427,269 | 1968 | 11,057,240 | 1967 | 10,652,551 | 1966 | 10,268,463 | 1965 | 9,882,063 | 1964 | 9,502,005 | 1963 | 9,206,926 | 1962 | 8,960,324 | 1961 | 8,717,840 | 1960 | 8,497,196 |
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