Year	Number
1996	-0.564544379711151
1998	-0.959317147731781
2000	-0.935892701148987
2002	-0.479136645793915
2003	-0.541941702365875
2004	-0.446660161018372
2005	-0.616481482982636
2006	-0.67350447177887
2007	-0.767759442329407
2008	-0.768929600715637
2009	-0.727106392383575
2010	-0.755830347537994
2011	-0.737969636917114
2012	-0.781678140163422
2013	-0.738182663917542
2014	-0.887117862701416
2015	-0.907132387161255
2016	-0.896797239780426
2017	-0.895876169204712
2018	-1.02382683753967
2019	-1.03205943107605
2020	-1.1801438331604
2021	-1.25470376014709
2022	-1.28731179237366