Year	Number
1996	-0.794187605381012
1998	-0.855796992778778
2000	-1.08369505405426
2002	-0.874504148960114
2003	-0.957668244838715
2004	-0.915175259113312
2005	-0.963954508304596
2006	-0.987496435642242
2007	-1.00755798816681
2008	-1.01145589351654
2009	-0.806498229503632
2010	-0.79579108953476
2011	-0.747264206409454
2012	-0.857621252536774
2013	-0.821557760238647
2014	-0.772919178009033
2015	-0.81479799747467
2016	-0.844158887863159
2017	-0.845057904720306
2018	-0.83245325088501
2019	-0.770942986011505
2020	-0.805172264575958
2021	-0.885359227657318
2022	-1.19529402256012