Year	Number
1996	-0.652150869369507
1998	-0.866834044456482
2000	-0.810647130012512
2002	-0.679399788379669
2003	-0.257107317447662
2004	-0.211594954133034
2005	-0.244842007756233
2006	-0.13034650683403
2007	-0.249015316367149
2008	-0.282543808221817
2009	-0.331883877515793
2010	-0.218933016061783
2011	-0.269520193338394
2012	-0.287803679704666
2013	-0.21225693821907
2014	-0.145544812083244
2015	-0.146352022886276
2016	-0.114290170371532
2017	-0.200866714119911
2018	-0.374979466199875
2019	-0.307872742414474
2020	-0.342688381671906
2021	-0.363395392894745
2022	-0.208831712603569