Year	Number
1996	-0.865277528762817
1998	-0.890717148780823
2000	-0.745444059371948
2002	-0.813145220279694
2003	-0.416793614625931
2004	-0.480672061443329
2005	-0.50867372751236
2006	-0.335918337106705
2007	-0.423062175512314
2008	-0.411013573408127
2009	-0.230227887630463
2010	-0.258609384298325
2011	-0.247806414961815
2012	-0.41251277923584
2013	-0.349038988351822
2014	-0.374780744314194
2015	-0.44723653793335
2016	-0.555807173252106
2017	-0.533897817134857
2018	-0.586034774780273
2019	-0.537628948688507
2020	-0.577217638492584
2021	-0.553035497665405
2022	-0.642081201076508