Year	Number
1996	-0.602832019329071
1998	-0.610585570335388
2000	-0.641752243041992
2002	-0.766993641853333
2003	-0.637721121311188
2004	-0.556896567344666
2005	-0.601215302944183
2006	-0.625979781150818
2007	-0.57259863615036
2008	-0.630675971508026
2009	-0.633366286754608
2010	-0.631919384002686
2011	-0.609958648681641
2012	-0.676629722118378
2013	-0.65251749753952
2014	-0.602058231830597
2015	-0.505210995674133
2016	-0.502611756324768
2017	-0.433582544326782
2018	-0.372491270303726
2019	-0.375260800123215
2020	-0.236916333436966
2021	-0.404661357402802
2022	-0.429956316947937