Year	Number
1996	-0.724763095378876
1998	-0.874252378940582
2000	-0.897491276264191
2002	-0.807996273040771
2003	-0.918026566505432
2004	-0.907455146312714
2005	-1.00211262702942
2006	-0.981054723262787
2007	-0.912372171878815
2008	-1.00112020969391
2009	-0.960240483283997
2010	-0.96263325214386
2011	-0.872488141059875
2012	-0.821808159351349
2013	-0.912537574768066
2014	-0.698205411434174
2015	-0.743951737880707
2016	-0.743826746940613
2017	-0.696423292160034
2018	-0.600180506706238
2019	-0.623606085777283
2020	-0.451601684093475
2021	-0.478109896183014
2022	-0.351662397384644