Year	Number
1996	-0.361505150794983
1998	-0.17823214828968
2000	-0.178624525666237
2002	-0.171931698918343
2003	-0.087321013212204
2004	0.0682040601968765
2005	0.0187454242259264
2006	-0.11058596521616
2007	-0.231792405247688
2008	-0.274787336587906
2009	-0.229267567396164
2010	-0.237023547291756
2011	-0.269264370203018
2012	-0.281460791826248
2013	-0.327604949474335
2014	-0.302766591310501
2015	-0.34570524096489
2016	-0.259969264268875
2017	-0.195962429046631
2018	-0.18804033100605
2019	-0.180789098143578
2020	-0.322116583585739
2021	-0.257637172937393
2022	-0.157897114753723