Year	Number
1996	-0.986241638660431
1998	-1.12488889694214
2000	-1.12596011161804
2002	-1.38355255126953
2003	-1.18086850643158
2004	-1.231241106987
2005	-1.22173345088959
2006	-1.19514667987823
2007	-1.0676943063736
2008	-0.988219559192657
2009	-0.978557884693146
2010	-0.952039062976837
2011	-0.903721451759338
2012	-0.995809435844421
2013	-0.904471814632416
2014	-0.766805112361908
2015	-0.700742721557617
2016	-0.545297205448151
2017	-0.624594211578369
2018	-0.758381545543671
2019	-0.730480670928955
2020	-0.751222908496857
2021	-0.796347439289093
2022	-0.762097477912903