| Year | Value | | 2022 | 2,229,999 | | 2021 | 2,226,487 | | 2020 | 2,209,607 | | 2019 | 2,167,371 | | 2018 | 2,115,454 | | 2017 | 2,063,063 | | 2016 | 2,007,680 | | 2015 | 1,949,876 | | 2014 | 1,897,016 | | 2013 | 1,855,682 | | 2012 | 1,820,856 | | 2011 | 1,793,087 | | 2010 | 1,780,927 | | 2009 | 1,787,603 | | 2008 | 1,812,056 | | 2007 | 1,863,307 | | 2006 | 1,916,356 | | 2005 | 1,930,487 | | 2004 | 1,912,493 | | 2003 | 1,872,323 | | 2002 | 1,791,969 | | 2001 | 1,690,179 | | 2000 | 1,612,000 | | 1999 | 1,559,823 | | 1998 | 1,520,328 | | 1997 | 1,497,557 | | 1996 | 1,493,912 | | 1995 | 1,496,906 | | 1994 | 1,490,053 | | 1993 | 1,471,802 | | 1992 | 1,454,394 | | 1991 | 1,446,892 | | 1990 | 1,447,556 | | 1989 | 1,453,489 | | 1988 | 1,465,247 | | 1987 | 1,478,737 | | 1986 | 1,490,688 | | 1985 | 1,502,599 | | 1984 | 1,515,840 | | 1983 | 1,532,165 | | 1982 | 1,556,778 | | 1981 | 1,592,791 | | 1980 | 1,637,084 | | 1979 | 1,660,915 | | 1978 | 1,632,518 | | 1977 | 1,570,730 | | 1976 | 1,508,152 | | 1975 | 1,455,350 | | 1974 | 1,439,440 | | 1973 | 1,484,409 | | 1972 | 1,556,568 | | 1971 | 1,611,240 | | 1970 | 1,641,340 | | 1969 | 1,654,921 | | 1968 | 1,660,637 | | 1967 | 1,664,397 | | 1966 | 1,666,035 | | 1965 | 1,663,370 | | 1964 | 1,654,740 | | 1963 | 1,641,413 | | 1962 | 1,622,139 | | 1961 | 1,599,363 | | 1960 | 1,575,500 |
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