Year	Number
1996	-0.00617526052519679
1998	0.00922123808413744
2000	-0.210961654782295
2002	-0.517511367797852
2003	-0.610630810260773
2004	-0.753035843372345
2005	-0.825216174125671
2006	-0.621390879154205
2007	-0.588803827762604
2008	-0.669306337833405
2009	-0.867817461490631
2010	-0.959066808223724
2011	-0.89161092042923
2012	-0.737359285354614
2013	-0.718928396701813
2014	-0.649084508419037
2015	-0.692901909351349
2016	-0.810879766941071
2017	-0.694215536117554
2018	-0.491404861211777
2019	-0.553631186485291
2020	-0.512035429477692
2021	-0.4888616502285
2022	-0.448678463697433