Year	Number
1996	-0.940338909626007
1998	-0.683586835861206
2000	-0.519492506980896
2002	-0.821777701377869
2003	-0.680515766143799
2004	-0.673581480979919
2005	-0.865804314613342
2006	-0.994356155395508
2007	-1.02745187282562
2008	-0.97846394777298
2009	-1.05367839336395
2010	-1.02666425704956
2011	-0.967787086963654
2012	-0.918653786182404
2013	-0.996962249279022
2014	-1.05270552635193
2015	-0.940731823444366
2016	-0.694988965988159
2017	-0.701115071773529
2018	-0.712358295917511
2019	-0.77079850435257
2020	-0.886475205421448
2021	-0.966126441955566
2022	-1.01707208156586