Year	Number
1996	-0.106926992535591
1998	0.103345759212971
2000	-0.233573436737061
2002	-0.240059301257133
2003	-0.319970190525055
2004	-0.243782788515091
2005	-0.425059497356415
2006	-0.476106464862823
2007	-0.386843711137772
2008	-0.433665722608566
2009	-0.367966145277023
2010	-0.231423750519753
2011	-0.452251225709915
2012	-0.49313035607338
2013	-0.423098087310791
2014	-0.305042803287506
2015	-0.286487638950348
2016	-0.190375789999962
2017	-0.199214860796928
2018	-0.289577841758728
2019	-0.335644423961639
2020	-0.412526339292526
2021	-0.420962542295456
2022	-0.357442885637283