Year	Number
1996	-0.474024802446365
1998	-0.662509441375732
2000	-0.715451121330261
2002	-0.782026052474976
2003	-0.61389023065567
2004	-0.800742328166962
2005	-0.879012823104858
2006	-0.598636865615845
2007	-0.694624125957489
2008	-0.531721472740173
2009	-0.480329960584641
2010	-0.47066456079483
2011	-0.533692061901093
2012	-0.53537255525589
2013	-0.492828667163849
2014	-0.310973823070526
2015	-0.319038301706314
2016	-0.380347073078156
2017	-0.276079922914505
2018	-0.276786595582962
2019	-0.479818254709244
2020	-0.501701951026917
2021	-0.575594961643219
2022	-0.602303206920624