Year	Number
1996	-1.22003042697906
1998	-1.08091521263123
2000	-0.894909560680389
2002	-0.955985903739929
2003	-0.804457187652588
2004	-1.17881202697754
2005	-1.06204557418823
2006	-0.818344295024872
2007	-0.818873345851898
2008	-0.899149179458618
2009	-1.07562577724457
2010	-1.08961069583893
2011	-1.08339202404022
2012	-1.06879222393036
2013	-0.962642073631287
2014	-0.838965237140656
2015	-0.834245920181274
2016	-0.9005406498909
2017	-0.803011357784271
2018	-0.801387310028076
2019	-0.879330098628998
2020	-0.856762230396271
2021	-0.809737384319305
2022	-0.804032683372498