Year | Value | 2022 | 22,889,298 | 2021 | 22,678,199 | 2020 | 22,465,694 | 2019 | 22,249,019 | 2018 | 22,027,014 | 2017 | 21,800,696 | 2016 | 21,571,303 | 2015 | 21,340,426 | 2014 | 21,106,519 | 2013 | 20,870,445 | 2012 | 20,634,269 | 2011 | 20,395,723 | 2010 | 20,154,486 | 2009 | 20,095,357 | 2008 | 19,886,051 | 2007 | 19,685,381 | 2006 | 19,484,104 | 2005 | 19,279,145 | 2004 | 19,077,001 | 2003 | 18,879,701 | 2002 | 18,683,681 | 2001 | 18,484,124 | 2000 | 18,280,746 | 1999 | 18,072,503 | 1998 | 17,863,135 | 1997 | 17,655,867 | 1996 | 17,443,158 | 1995 | 17,220,607 | 1994 | 16,989,567 | 1993 | 16,757,748 | 1992 | 16,529,209 | 1991 | 16,298,168 | 1990 | 16,063,515 | 1989 | 15,827,047 | 1988 | 15,589,854 | 1987 | 15,353,727 | 1986 | 15,121,779 | 1985 | 14,894,307 | 1984 | 14,672,462 | 1983 | 14,452,651 | 1982 | 14,234,248 | 1981 | 14,018,171 | 1980 | 13,804,052 | 1979 | 13,592,350 | 1978 | 13,382,114 | 1977 | 13,175,780 | 1976 | 12,975,103 | 1975 | 12,779,176 | 1974 | 12,580,117 | 1973 | 12,381,457 | 1972 | 12,193,317 | 1971 | 12,014,710 | 1970 | 11,837,757 | 1969 | 11,663,371 | 1968 | 11,495,179 | 1967 | 11,327,623 | 1966 | 11,160,113 | 1965 | 10,994,680 | 1964 | 10,831,793 | 1963 | 10,669,192 | 1962 | 10,506,660 | 1961 | 10,345,584 | 1960 | 10,191,482 |
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