Year	Number
1996	-1.10455310344696
1998	-1.26492917537689
2000	-0.776030659675598
2002	-0.72216534614563
2003	-0.652008533477783
2004	-0.407748281955719
2005	-0.393915474414825
2006	-0.345979183912277
2007	-0.363606303930283
2008	-0.298690915107727
2009	-0.560373842716217
2010	-0.50098443031311
2011	-0.304419666528702
2012	-0.103577204048634
2013	-0.136436149477959
2014	0.0231748018413782
2015	0.0633481442928314
2016	0.206190809607506
2017	0.0935089886188507
2018	0.11081126332283
2019	-0.0755313858389854
2020	-0.209088623523712
2021	-0.131573155522346
2022	-0.0361724458634853