Year	Number
1996	-0.473051309585571
1998	-0.936306059360504
2000	-0.84808623790741
2002	-0.77816516160965
2003	-0.649022400379181
2004	-0.703455328941345
2005	-0.683349847793579
2006	-0.669232606887817
2007	-0.745891690254211
2008	-0.712412357330322
2009	-0.621459662914276
2010	-0.695039570331573
2011	-0.664559423923492
2012	-0.588001489639282
2013	-0.530450224876404
2014	-0.565155386924744
2015	-0.609267175197601
2016	-0.659123718738556
2017	-0.636488139629364
2018	-0.408891350030899
2019	-0.226975172758102
2020	-0.00343869999051094
2021	0.048978328704834
2022	0.0280352365225554