Year	Number
1996	-0.316063106060028
1998	-0.260301351547241
2000	-0.228705078363419
2002	-1.02161753177643
2003	-0.758814632892609
2004	-0.801194429397583
2005	-0.715679585933685
2006	-0.549526333808899
2007	-0.516006529331207
2008	-0.445902675390244
2009	-0.40589764714241
2010	-0.48874643445015
2011	-0.426366478204727
2012	-0.477253526449203
2013	-0.619572818279266
2014	-0.761226177215576
2015	-0.793731868267059
2016	-0.784189403057098
2017	-0.687254250049591
2018	-0.765652000904083
2019	-0.785404324531555
2020	-0.392753958702087
2021	-0.32319375872612
2022	-0.610480070114136