Year	Number
1996	-1.02158069610596
1998	-1.0281069278717
2000	-0.921858787536621
2002	-0.966853559017181
2003	-0.923378527164459
2004	-0.864229917526245
2005	-0.880881011486053
2006	-0.882364630699158
2007	-0.971304595470428
2008	-0.999996304512024
2009	-1.02264547348022
2010	-0.953961968421936
2011	-0.912996649742126
2012	-0.831432938575745
2013	-0.714889407157898
2014	-0.411822497844696
2015	-0.506872713565826
2016	-0.455839782953262
2017	-0.430152922868729
2018	-0.427653700113297
2019	-0.464465975761414
2020	-0.577875256538391
2021	-0.421999156475067
2022	-0.321951180696487