| Year | Value | | 2022 | 3,098,960 | | 2021 | 3,112,083 | | 2020 | 3,110,606 | | 2019 | 3,113,830 | | 2018 | 3,120,423 | | 2017 | 3,115,632 | | 2016 | 3,113,955 | | 2015 | 3,113,821 | | 2014 | 3,114,598 | | 2013 | 3,139,570 | | 2012 | 3,195,342 | | 2011 | 3,255,050 | | 2010 | 3,335,108 | | 2009 | 3,430,412 | | 2008 | 3,517,367 | | 2007 | 3,585,784 | | 2006 | 3,650,561 | | 2005 | 3,725,531 | | 2004 | 3,814,185 | | 2003 | 3,923,815 | | 2002 | 4,053,522 | | 2001 | 4,209,954 | | 2000 | 4,383,588 | | 1999 | 4,576,983 | | 1998 | 4,782,230 | | 1997 | 4,954,265 | | 1996 | 5,065,076 | | 1995 | 5,102,695 | | 1994 | 5,061,130 | | 1993 | 4,959,313 | | 1992 | 4,864,423 | | 1991 | 4,687,458 | | 1990 | 4,509,015 | | 1989 | 4,441,559 | | 1988 | 4,359,823 | | 1987 | 4,243,610 | | 1986 | 4,218,441 | | 1985 | 4,210,417 | | 1984 | 4,118,510 | | 1983 | 4,061,543 | | 1982 | 4,014,861 | | 1981 | 3,987,680 | | 1980 | 4,003,297 | | 1979 | 4,036,368 | | 1978 | 4,084,653 | | 1977 | 4,192,361 | | 1976 | 4,350,885 | | 1975 | 4,538,051 | | 1974 | 4,824,432 | | 1973 | 5,183,686 | | 1972 | 5,490,368 | | 1971 | 5,574,179 | | 1970 | 5,355,455 | | 1969 | 5,096,030 | | 1968 | 4,816,852 | | 1967 | 4,568,799 | | 1966 | 4,501,850 | | 1965 | 4,604,643 | | 1964 | 4,599,528 | | 1963 | 4,474,128 | | 1962 | 4,357,063 | | 1961 | 4,264,600 | | 1960 | 4,206,802 |
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