Year	Number
1996	-0.984400629997253
1998	-0.743582248687744
2000	-0.770442664623261
2002	-0.772763192653656
2003	-0.730028569698334
2004	-0.683769524097443
2005	-0.412261575460434
2006	-0.553185999393463
2007	-0.557963252067566
2008	-0.464942008256912
2009	-0.525119125843048
2010	-0.564630508422852
2011	-0.567633330821991
2012	-0.609249889850616
2013	-0.582843363285065
2014	-0.743807315826416
2015	-0.780473530292511
2016	-0.720742762088776
2017	-0.72677218914032
2018	-0.682929277420044
2019	-0.72416877746582
2020	-0.79823899269104
2021	-0.760396122932434
2022	-0.72080385684967