Year | Value | 2022 | 16.84612566143 | 2021 | 19.082322772104 | 2020 | 19.151400299288 | 2019 | 19.196140096621 | 2018 | 20.142552513804 | 2017 | 20.052367699608 | 2016 | 19.630119809656 | 2015 | 20.451365421132 | 2014 | 17.294347838416 | 2013 | 16.898684339283 | 2012 | 17.6333154227 | 2011 | 17.840049274447 | 2010 | 14.997505767077 | 2009 | 15.789236380224 | 2008 | 17.091717861688 | 2007 | 15.81795379081 | 2006 | 17.092163435501 | 2005 | 16.528770567977 | 2004 | 12.814091456061 | 2003 | 13.161625947039 | 2002 | 12.632797141002 | 2001 | 11.662412690896 | 2000 | 13.615381994913 | 1999 | 12.991751123104 |
|