Year	Number
1996	0.518067419528961
1998	0.521346211433411
2000	0.182292386889458
2002	-0.880716562271118
2003	-0.691475629806519
2004	-0.698035299777985
2005	-0.525074362754822
2006	-0.61456698179245
2007	-0.635693550109863
2008	-0.702629446983337
2009	-0.830836772918701
2010	-0.742940902709961
2011	-0.701964378356934
2012	-0.897686779499054
2013	-0.928134799003601
2014	-1.0661495923996
2015	-0.898022353649139
2016	-0.347571164369583
2017	-0.196299895644188
2018	-0.195977628231049
2019	-0.453079700469971
2020	-0.498344272375107
2021	-0.631172716617584
2022	-0.697565734386444