Year	Number
1996	-1.01341414451599
1998	-0.669719815254211
2000	-0.768333911895752
2002	-0.834293127059937
2003	-0.774796605110168
2004	-0.808034837245941
2005	-0.835618197917938
2006	-0.735238790512085
2007	-0.753424942493439
2008	-0.713971555233002
2009	-0.925672590732574
2010	-0.852924466133118
2011	-0.744141399860382
2012	-0.633820176124573
2013	-0.674156248569489
2014	-0.655563533306122
2015	-0.654437899589539
2016	-0.545003712177277
2017	-0.651365458965302
2018	-0.538192272186279
2019	-0.577349424362183
2020	-0.415842652320862
2021	-0.395547091960907
2022	-0.30497133731842