Year	Number
1996	-0.148073524236679
1998	-0.354077637195587
2000	-0.258079946041107
2002	-0.570128738880157
2003	-0.209118396043777
2004	-0.19190439581871
2005	-0.0352728292346001
2006	0.0266746040433645
2007	0.11251862347126
2008	0.115325570106506
2009	0.087655708193779
2010	0.0254152249544859
2011	0.0382425226271153
2012	0.161344781517982
2013	0.0917898043990135
2014	-0.134037971496582
2015	-0.161285012960434
2016	-0.198886200785637
2017	-0.208401128649712
2018	-0.351102501153946
2019	-0.325625747442245
2020	-0.361126631498337
2021	-0.407550573348999
2022	-0.467645317316055