Year	Number
1996	0.371830761432648
1998	-0.191821798682213
2000	-0.577913403511047
2002	-0.103369668126106
2003	-1.23235356807709
2004	-0.611157953739166
2005	-0.49144771695137
2006	-0.0852985605597496
2007	-0.176476791501045
2008	0.01727613247931
2009	-0.15804822742939
2010	-0.282062977552414
2011	-0.058007225394249
2012	0.0337390303611755
2013	0.0674438998103142
2014	0.498692989349365
2015	0.53887152671814
2016	0.524906516075134
2017	0.394011855125427
2018	0.407829284667969
2019	0.530268251895905
2020	0.693885385990143
2021	0.712418019771576
2022	0.802727520465851