Year	Number
1996	-0.422995418310165
1998	-0.755780398845673
2000	-0.688496112823486
2002	-0.472972482442856
2003	-0.728653252124786
2004	-0.592195391654968
2005	-0.710663259029388
2006	-0.723454773426056
2007	-0.775851249694824
2008	-0.752358675003052
2009	-0.806728780269623
2010	-0.883080899715424
2011	-0.844827234745026
2012	-0.897264659404755
2013	-0.91161584854126
2014	-0.841781139373779
2015	-0.87349009513855
2016	-0.810025572776794
2017	-0.787117958068848
2018	-0.830727458000183
2019	-0.838781177997589
2020	-0.751166820526123
2021	-0.590034484863281
2022	-0.439608067274094