| Year | Value | | 2024 | 2,138,047 | | 2023 | 2,088,101 | | 2022 | 2,036,647 | | 2021 | 1,986,363 | | 2020 | 1,942,727 | | 2019 | 1,901,429 | | 2018 | 1,859,663 | | 2017 | 1,820,733 | | 2016 | 1,783,504 | | 2015 | 1,754,098 | | 2014 | 1,733,692 | | 2013 | 1,717,098 | | 2012 | 1,702,040 | | 2011 | 1,685,182 | | 2010 | 1,659,061 | | 2009 | 1,620,003 | | 2008 | 1,574,429 | | 2007 | 1,524,796 | | 2006 | 1,472,864 | | 2005 | 1,419,769 | | 2004 | 1,367,995 | | 2003 | 1,318,168 | | 2002 | 1,268,357 | | 2001 | 1,218,321 | | 2000 | 1,168,101 | | 1999 | 1,118,276 | | 1998 | 1,067,647 | | 1997 | 1,016,936 | | 1996 | 968,241 | | 1995 | 921,030 | | 1994 | 875,562 | | 1993 | 834,082 | | 1992 | 796,602 | | 1991 | 761,678 | | 1990 | 729,051 | | 1989 | 698,374 | | 1988 | 669,300 | | 1987 | 641,202 | | 1986 | 614,158 | | 1985 | 587,769 | | 1984 | 561,899 | | 1983 | 537,037 | | 1982 | 512,958 | | 1981 | 490,114 | | 1980 | 468,911 | | 1979 | 449,255 | | 1978 | 431,002 | | 1977 | 413,949 | | 1976 | 397,760 | | 1975 | 382,273 |
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