Year	Number
1996	-0.409403622150421
1998	-0.519163191318512
2000	-0.516841351985931
2002	-0.631543517112732
2003	-0.912192344665527
2004	-0.687912881374359
2005	-0.708473205566406
2006	-0.999829351902008
2007	-0.906883299350739
2008	-0.9123814702034
2009	-0.838367760181427
2010	-0.903547346591949
2011	-0.89624410867691
2012	-1.00081920623779
2013	-1.01948356628418
2014	-1.06136298179626
2015	-1.11241888999939
2016	-1.05032098293304
2017	-1.09680545330048
2018	-1.12270367145538
2019	-1.13980984687805
2020	-1.17824411392212
2021	-1.19166457653046
2022	-1.12725257873535