Year	Number
1996	0.0303032286465168
1998	0.0419004894793034
2000	-0.31657275557518
2002	0.149915769696236
2003	-0.282602161169052
2004	-0.727014660835266
2005	-0.39935889840126
2006	-0.383677423000336
2007	-0.372163325548172
2008	-0.700911939144135
2009	-0.971093595027924
2010	-0.564225971698761
2011	-0.451289445161819
2012	-0.587406158447266
2013	-0.525646507740021
2014	-0.256007999181747
2015	-0.235928744077682
2016	-0.228087186813354
2017	0.0646955594420433
2018	0.0395447723567486
2019	0.0334556773304939
2020	-0.102151036262512
2021	-0.00529439095407724
2022	-0.0602172017097473