Year	Number
1996	-0.340196430683136
1998	-0.476207077503204
2000	-0.360874891281128
2002	-0.49532476067543
2003	-0.530814051628113
2004	-0.685506939888
2005	-0.885935664176941
2006	-0.761204540729523
2007	-0.653770744800568
2008	-0.697395861148834
2009	-0.750869333744049
2010	-0.730952560901642
2011	-0.716937601566315
2012	-0.739490449428558
2013	-0.661215305328369
2014	-0.615127503871918
2015	-0.602132976055145
2016	-0.733419239521027
2017	-0.663798868656158
2018	-0.65572988986969
2019	-0.792493879795074
2020	-0.827988862991333
2021	-0.886141121387482
2022	-0.807290256023407