Year | Value | 2022 | 25.558489608078 | 2021 | 26.61017950382 | 2020 | 26.293691882361 | 2019 | 27.446110047801 | 2018 | 26.738493590196 | 2017 | 24.712680906288 | 2016 | 25.737862523357 | 2015 | 25.331822514391 | 2014 | 24.540182580621 | 2013 | 24.483348045249 | 2012 | 21.064895375217 | 2011 | 20.935878313269 | 2010 | 20.75141542214 | 2009 | 19.779037952501 | 2008 | 17.698163013485 | 2007 | 16.764685743172 | 2006 | 18.081168412212 | 2005 | 16.573849532998 | 2004 | 16.696465489356 | 2003 | 15.785716872019 | 2002 | 18.543711441491 | 2001 | 19.773595558485 | 2000 | 19.251434602945 | 1999 | 18.709648019869 | 1998 | 21.345410944983 | 1997 | 21.503297900888 | 1996 | 20.751594229917 | 1995 | 19.334844021535 | 1994 | 15.696837859191 | 1993 | 11.878287075075 |
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