Year	Number
1996	-0.223502203822136
1998	-0.202992081642151
2000	-0.244871854782104
2002	-0.266611307859421
2003	-0.367893666028976
2004	-0.400920122861862
2005	-0.475531458854675
2006	-0.402620196342468
2007	-0.40977942943573
2008	-0.288044780492783
2009	-0.103854693472385
2010	0.0564144365489483
2011	0.0451417230069637
2012	-0.0769327953457832
2013	-0.0918470323085785
2014	-0.0527190156280994
2015	-0.187204733490944
2016	-0.201229780912399
2017	-0.305652469396591
2018	-0.302387714385986
2019	-0.224174305796623
2020	-0.231702029705048
2021	-0.300649881362915
2022	-0.257250934839249