Year	Number
1996	-0.16697995364666
1998	-0.130363434553146
2000	-0.187658607959747
2002	-0.0883368402719498
2003	-0.140504896640778
2004	-0.107689194381237
2005	-0.101316899061203
2006	-0.15525296330452
2007	-0.17409847676754
2008	-0.203979909420013
2009	-0.0972685068845749
2010	-0.0802930667996407
2011	0.0258786492049694
2012	-0.222083896398544
2013	-0.253400027751923
2014	-0.0647884458303452
2015	-0.141504943370819
2016	0.0338741727173328
2017	0.00729416264221072
2018	-0.159152254462242
2019	-0.19204206764698
2020	-0.285406231880188
2021	-0.26869609951973
2022	-0.360025137662888