Year	Number
1996	-0.864106297492981
1998	-1.16007697582245
2000	-0.908694446086884
2002	-1.13730299472809
2003	-0.979823589324951
2004	-0.976611793041229
2005	-0.906051814556122
2006	-0.86427628993988
2007	-0.630509197711945
2008	-0.639086067676544
2009	-0.889640629291534
2010	-0.803534507751465
2011	-0.755870699882507
2012	-0.689105808734894
2013	-0.660039663314819
2014	-0.597599148750305
2015	-0.518548130989075
2016	-0.462464272975922
2017	-0.304816424846649
2018	-0.29945981502533
2019	-0.473180323839188
2020	-0.454076617956162
2021	-0.449074685573578
2022	-0.434910655021667