Year	Number
1996	-0.503623306751251
1998	-0.457131624221802
2000	-0.405623823404312
2002	-0.486519575119019
2003	-0.616726696491241
2004	-0.757936656475067
2005	-0.725180208683014
2006	-0.790643990039825
2007	-0.702090203762054
2008	-1.16015195846558
2009	-0.814965605735779
2010	-0.897638857364655
2011	-0.929718732833862
2012	-0.939481437206268
2013	-1.00883817672729
2014	-0.873080670833588
2015	-0.891843855381012
2016	-0.745787799358368
2017	-0.619425773620605
2018	-0.707490384578705
2019	-0.608239710330963
2020	-0.605059206485748
2021	-0.686039745807648
2022	-0.658643126487732