Year	Number
1996	-0.380564451217651
1998	-0.349467724561691
2000	-0.405962914228439
2002	-0.563407242298126
2003	-0.556115865707397
2004	-0.657609522342682
2005	-0.875677227973938
2006	-0.815081477165222
2007	-0.786064028739929
2008	-0.79922616481781
2009	-0.96954619884491
2010	-0.656763851642609
2011	-0.636238276958466
2012	-0.64659321308136
2013	-0.649349510669708
2014	-0.86930114030838
2015	-0.97831004858017
2016	-0.96501898765564
2017	-0.752876222133636
2018	-0.646391749382019
2019	-0.731642365455627
2020	-0.576527297496796
2021	-0.776597917079926
2022	-0.889000654220581