Year	Number
1996	-0.0565393306314945
1998	-0.083364762365818
2000	-0.199228778481483
2002	-0.216593146324158
2003	-0.272020310163498
2004	-0.167387902736664
2005	-0.339861780405045
2006	-0.194801017642021
2007	-0.146113589406013
2008	-0.218608349561691
2009	-0.396393328905106
2010	-0.419682919979095
2011	-0.399362593889236
2012	-0.241880506277084
2013	-0.22082956135273
2014	-0.345142692327499
2015	-0.376569151878357
2016	-0.33566477894783
2017	-0.489461153745651
2018	-0.35246741771698
2019	-0.303825676441193
2020	-0.3304543197155
2021	-0.356352984905243
2022	-0.383287221193314