Year	Number
1996	-0.0265951305627823
1998	-0.0194181017577648
2000	-0.042195025831461
2002	-0.0708565190434456
2003	-0.103218950331211
2004	-0.103965632617474
2005	-0.201737865805626
2006	-0.313596040010452
2007	-0.324733346700668
2008	-0.302956253290176
2009	0.0413168966770172
2010	-0.0235743168741465
2011	-0.307089060544968
2012	-0.0309748947620392
2013	0.0204453207552433
2014	-0.159106820821762
2015	-0.209245666861534
2016	-0.229891732335091
2017	-0.305803924798965
2018	-0.169436514377594
2019	-0.191070929169655
2020	-0.193349361419678
2021	-0.330022901296616
2022	-0.237028583884239