Year | Value | 2023 | 36,254 | 2022 | 35,963 | 2021 | 35,515 | 2020 | 34,460 | 2019 | 34,763 | 2018 | 34,638 | 2017 | 34,606 | 2016 | 34,495 | 2015 | 34,384 | 2014 | 34,219 | 2013 | 33,996 | 2012 | 33,754 | 2011 | 33,473 | 2010 | 33,441 | 2009 | 31,411 | 2008 | 29,761 | 2007 | 28,104 | 2006 | 31,896 | 2005 | 31,452 | 2004 | 29,982 | 2003 | 30,272 | 2002 | 30,548 | 2001 | 32,363 | 2000 | 33,149 | 1999 | 32,610 | 1998 | 31,928 | 1997 | 31,252 | 1996 | 30,578 | 1995 | 29,895 | 1994 | 29,221 | 1993 | 28,573 | 1992 | 27,943 | 1991 | 27,308 |
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