Year	Number
1996	-0.86559009552002
1998	-1.07325422763824
2000	-0.945642471313477
2002	-1.02048659324646
2003	-0.916420161724091
2004	-0.887320101261139
2005	-0.72455096244812
2006	-0.848922550678253
2007	-0.761082708835602
2008	-0.730393648147583
2009	-0.611198544502258
2010	-0.658249199390411
2011	-0.652857542037964
2012	-0.647685706615448
2013	-0.618868470191956
2014	-0.695217669010162
2015	-0.67460685968399
2016	-0.666101396083832
2017	-0.688091576099396
2018	-0.592441618442535
2019	-0.570193111896515
2020	-0.665765345096588
2021	-0.582625091075897
2022	-0.585803985595703