Year | Value | 2021 | 35.861738732935 | 2020 | 31.82428950647 | 2019 | 27.764922344199 | 2018 | 24.825270197589 | 2017 | 21.27023290201 | 2016 | 18.63630830755 | 2015 | 16.011709929934 | 2014 | 13.368985426336 | 2013 | 11.159389096957 | 2012 | 9.2848874200768 | 2011 | 7.59663525203 | 2010 | 6.1379678439958 | 2009 | 4.3129981002394 | 2008 | 3.669101868449 | 2007 | 3.3699983856892 | 2006 | 2.6591570317347 | 2005 | 2.0158884715543 | 2004 | 1.4952702723352 | 2003 | 1.1148329480009 | 2002 | 0.83916861739289 | 2001 | 0.6565449400512 | 2000 | 0.51690953770624 | 1999 | 0.37397653286121 | 1998 | 0.24472711455321 | 1997 | 0.1350885355292 | 1996 | 0.072317885641883 | 1995 | 0.051620303531619 | 1994 | 0.018911592717831 | 1993 | 0.0087245064944518 | 1992 | 0.0030060510931949 | 1991 | 0.0010333900629441 |
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