| Year | Value | | 2022 | 3,147,308 | | 2021 | 3,143,934 | | 2020 | 3,148,065 | | 2019 | 3,148,506 | | 2018 | 3,167,427 | | 2017 | 3,216,747 | | 2016 | 3,267,980 | | 2015 | 3,336,039 | | 2014 | 3,424,687 | | 2013 | 3,503,778 | | 2012 | 3,568,262 | | 2011 | 3,633,150 | | 2010 | 3,709,316 | | 2009 | 3,791,057 | | 2008 | 3,894,892 | | 2007 | 4,022,406 | | 2006 | 4,174,047 | | 2005 | 4,344,697 | | 2004 | 4,536,893 | | 2003 | 4,743,653 | | 2002 | 4,913,465 | | 2001 | 5,020,365 | | 2000 | 5,055,504 | | 1999 | 5,016,274 | | 1998 | 4,919,118 | | 1997 | 4,828,677 | | 1996 | 4,658,704 | | 1995 | 4,485,970 | | 1994 | 4,420,146 | | 1993 | 4,339,389 | | 1992 | 4,218,578 | | 1991 | 4,188,462 | | 1990 | 4,180,003 | | 1989 | 4,095,717 | | 1988 | 4,044,211 | | 1987 | 4,006,134 | | 1986 | 3,986,259 | | 1985 | 4,009,078 | | 1984 | 4,045,299 | | 1983 | 4,093,811 | | 1982 | 4,200,962 | | 1981 | 4,362,795 | | 1980 | 4,558,299 | | 1979 | 4,862,267 | | 1978 | 5,241,801 | | 1977 | 5,570,307 | | 1976 | 5,662,399 | | 1975 | 5,496,045 | | 1974 | 5,253,861 | | 1973 | 4,999,793 | | 1972 | 4,750,889 | | 1971 | 4,668,158 | | 1970 | 4,695,965 | | 1969 | 4,655,851 | | 1968 | 4,503,754 | | 1967 | 4,381,229 | | 1966 | 4,283,527 | | 1965 | 4,220,780 | | 1964 | 4,220,439 | | 1963 | 4,253,070 | | 1962 | 4,255,546 | | 1961 | 4,222,666 | | 1960 | 4,174,869 |
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