Year	Number
1996	-1.2563259601593
1998	-1.21814870834351
2000	-0.938497543334961
2002	-1.0840562582016
2003	-0.912254095077515
2004	-0.749769985675812
2005	-0.695962607860565
2006	-0.461667329072952
2007	-0.344459146261215
2008	-0.262944459915161
2009	-0.199315324425697
2010	-0.205984979867935
2011	-0.119617037475109
2012	-0.00621734838932753
2013	0.00495237018913031
2014	0.224652022123337
2015	0.221943572163582
2016	0.336223185062408
2017	0.262213170528412
2018	0.270468592643738
2019	0.248666971921921
2020	0.222179666161537
2021	0.144988313317299
2022	0.169973269104958