Year Number 1996 0.202324584126472 1998 0.323917388916016 2000 0.430507242679596 2002 0.371119827032089 2003 0.741625964641571 2004 0.693027317523956 2005 0.617250144481659 2006 0.702901244163513 2007 0.750295639038086 2008 0.825089991092682 2009 0.79990166425705 2010 0.905523717403412 2011 0.882513642311096 2012 1.0400071144104 2013 0.916983842849731 2014 1.15049386024475 2015 1.12657499313354 2016 1.01915276050568 2017 0.959278523921967 2018 0.894913613796234 2019 0.862325489521027 2020 0.851257979869843 2021 0.810911178588867 2022 0.750284731388092