Year	Number
1996	-1.29677534103394
1998	-1.26635813713074
2000	-1.31623375415802
2002	-1.23277902603149
2003	-1.15582895278931
2004	-0.991614580154419
2005	-1.11570703983307
2006	-1.02831625938416
2007	-0.982684671878815
2008	-0.899132013320923
2009	-0.931926727294922
2010	-0.848106443881989
2011	-0.994923114776611
2012	-1.05003821849823
2013	-1.13566875457764
2014	-1.07841408252716
2015	-1.0579651594162
2016	-1.10960459709167
2017	-1.03246831893921
2018	-0.984722435474396
2019	-0.910632014274597
2020	-0.975501298904419
2021	-0.941965937614441
2022	-0.94841742515564