Year	Number
1996	-0.525804400444031
1998	-0.314075171947479
2000	-0.330477774143219
2002	-0.578485012054443
2003	-0.577274203300476
2004	-0.527328252792358
2005	-0.559557259082794
2006	-0.458761304616928
2007	-0.390169739723206
2008	-0.424137949943542
2009	-0.408670276403427
2010	-0.483745783567429
2011	-0.404689967632294
2012	-0.427046447992325
2013	-0.519340336322784
2014	-0.633841454982758
2015	-0.633086144924164
2016	-0.63912957906723
2017	-0.616949379444122
2018	-0.600795805454254
2019	-0.623046398162842
2020	-0.673809766769409
2021	-0.634793400764465
2022	-0.634121775627136