Year	Number
1996	-0.219651892781258
1998	-0.406413346529007
2000	-0.346270352602005
2002	-0.444490075111389
2003	-0.535602867603302
2004	-0.571611404418945
2005	-0.651503562927246
2006	-0.920553743839264
2007	-0.916404008865356
2008	-0.870993554592133
2009	-0.89992368221283
2010	-0.889000535011292
2011	-0.883593857288361
2012	-0.97881817817688
2013	-1.02217721939087
2014	-1.04440438747406
2015	-1.08774089813232
2016	-1.13166010379791
2017	-1.0898312330246
2018	-1.07016456127167
2019	-1.11750900745392
2020	-1.07227349281311
2021	-1.101229429245
2022	-1.26163399219513