Year	Number
1996	-0.840301275253296
1998	-0.806041300296783
2000	-0.824051260948181
2002	-1.11372554302216
2003	-0.970146477222443
2004	-1.01313292980194
2005	-1.03712630271912
2006	-1.14316499233246
2007	-1.18739795684814
2008	-1.16600322723389
2009	-1.12358593940735
2010	-1.059894323349
2011	-1.00236999988556
2012	-1.01962530612946
2013	-1.02441227436066
2014	-1.0696713924408
2015	-0.900185465812683
2016	-0.888324558734894
2017	-0.866547703742981
2018	-0.806409239768982
2019	-0.812190234661102
2020	-0.878001868724823
2021	-0.980414152145386
2022	-1.05010461807251