Year	Number
1996	-0.710006773471832
1998	-0.776588618755341
2000	-0.651787340641022
2002	-0.695015847682953
2003	-0.687298893928528
2004	-0.429903537034988
2005	-0.513849496841431
2006	-0.865734755992889
2007	-1.04032266139984
2008	-1.02059841156006
2009	-1.00349426269531
2010	-1.01213717460632
2011	-1.08491718769073
2012	-0.921773374080658
2013	-0.978366434574127
2014	-1.1334308385849
2015	-1.14476382732391
2016	-1.15101516246796
2017	-1.1764349937439
2018	-1.20660161972046
2019	-1.3074254989624
2020	-1.28754377365112
2021	-1.17388951778412
2022	-1.04874444007874