Year	Number
1996	-0.687850117683411
1998	-0.490328997373581
2000	-0.607652246952057
2002	-0.726736128330231
2003	-0.838938593864441
2004	-0.93288254737854
2005	-0.918954312801361
2006	-0.838699102401733
2007	-0.70753276348114
2008	-0.738396406173706
2009	-0.802756428718567
2010	-0.753689587116241
2011	-0.772120714187622
2012	-0.807726144790649
2013	-0.796950340270996
2014	-0.774807810783386
2015	-0.752515137195587
2016	-0.706855893135071
2017	-0.751890540122986
2018	-0.762530446052551
2019	-0.753748297691345
2020	-0.779725730419159
2021	-0.65562778711319
2022	-0.76255190372467