Year	Number
1996	-0.756474375724792
1998	-0.724983811378479
2000	-0.736801981925964
2002	-0.789458632469177
2003	-0.892783045768738
2004	-0.881412625312805
2005	-1.08549165725708
2006	-1.02614569664001
2007	-0.919340312480927
2008	-0.978874683380127
2009	-0.942291140556335
2010	-0.780791580677032
2011	-0.860041797161102
2012	-0.957400441169739
2013	-0.91197144985199
2014	-0.948121190071106
2015	-0.820208132266998
2016	-0.841146886348724
2017	-0.590534508228302
2018	-0.511336386203766
2019	-0.471661597490311
2020	-0.396271407604218
2021	-0.456325620412827
2022	-0.563655316829681