| Year | Value | | 2023 | 3,731,149 | | 2022 | 3,761,289 | | 2021 | 3,866,026 | | 2020 | 3,919,996 | | 2019 | 3,999,862 | | 2018 | 4,016,701 | | 2017 | 3,982,216 | | 2016 | 3,956,680 | | 2015 | 3,940,825 | | 2014 | 3,899,441 | | 2013 | 3,880,979 | | 2012 | 3,818,310 | | 2011 | 3,742,584 | | 2010 | 3,672,023 | | 2009 | 3,698,404 | | 2008 | 3,680,131 | | 2007 | 3,662,908 | | 2006 | 3,614,884 | | 2005 | 3,550,951 | | 2004 | 3,525,372 | | 2003 | 3,479,071 | | 2002 | 3,493,929 | | 2001 | 3,439,630 | | 2000 | 3,353,910 | | 1999 | 3,341,325 | | 1998 | 3,328,056 | | 1997 | 3,274,618 | | 1996 | 3,235,494 | | 1995 | 3,088,667 | | 1994 | 3,035,894 | | 1993 | 2,951,648 | | 1992 | 2,880,621 | | 1991 | 2,897,542 |
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