Year	Number
1996	-0.335017144680023
1998	-0.248288303613663
2000	-0.481999129056931
2002	-0.344297826290131
2003	-0.500723600387573
2004	-0.412029087543488
2005	-0.410603523254395
2006	-0.396132677793503
2007	-0.350273311138153
2008	-0.297387421131134
2009	-0.401666194200516
2010	-0.43237179517746
2011	-0.371135145425797
2012	-0.34698748588562
2013	-0.319276750087738
2014	-0.23679293692112
2015	-0.191106840968132
2016	-0.172127351164818
2017	-0.133667439222336
2018	-0.217798143625259
2019	-0.310624003410339
2020	-0.239620462059975
2021	-0.196268677711487
2022	-0.0719267576932907