Year	Number
1996	-1.08020269870758
1998	-0.826229512691498
2000	-0.823291063308716
2002	-0.911196768283844
2003	-0.842919766902924
2004	-0.810298979282379
2005	-0.931051731109619
2006	-0.972049713134766
2007	-0.854186415672302
2008	-0.828287124633789
2009	-0.85378509759903
2010	-0.903040051460266
2011	-0.894476115703583
2012	-0.905474781990051
2013	-0.925010025501251
2014	-0.812077939510345
2015	-0.833250224590302
2016	-0.822241187095642
2017	-0.861996114253998
2018	-0.857515573501587
2019	-0.866170048713684
2020	-0.931451499462128
2021	-0.90432471036911
2022	-0.881544709205627