Year	Number
1996	-0.307622253894806
1998	-0.331668794155121
2000	-0.596572577953339
2002	-0.576304018497467
2003	-0.506772220134735
2004	-0.192752614617348
2005	-0.297171354293823
2006	-0.537630379199982
2007	-0.42130321264267
2008	-0.32037752866745
2009	-0.291893154382706
2010	-0.302208334207535
2011	-0.269508898258209
2012	-0.251570194959641
2013	-0.230700820684433
2014	-0.0555961318314075
2015	-0.237048774957657
2016	-0.342697590589523
2017	-0.308716684579849
2018	-0.307711988687515
2019	-0.305708944797516
2020	-0.10571563988924
2021	-0.099911168217659
2022	-0.0962801203131676