Year	Number
1996	0.217267140746117
1998	0.19696219265461
2000	0.162798807024956
2002	-0.22530834376812
2003	0.622443974018097
2004	0.245569571852684
2005	-0.0185725726187229
2006	0.185515359044075
2007	0.0896256566047668
2008	-0.469336181879044
2009	-0.733878493309021
2010	-0.978338837623596
2011	-0.705585896968842
2012	-0.536136984825134
2013	-0.659993410110474
2014	-0.557235836982727
2015	-0.427762925624847
2016	-0.294186472892761
2017	-0.302837580442429
2018	-0.578839123249054
2019	-0.313983827829361
2020	-0.509343922138214
2021	-0.542279779911041
2022	-0.531038582324982