Year	Number
1996	-0.0254242550581694
1998	0.122733883559704
2000	-0.174555346369743
2002	-0.149828881025314
2003	-0.170014277100563
2004	-0.113614901900291
2005	-0.268432378768921
2006	-0.252237617969513
2007	-0.250690668821335
2008	-0.255989253520966
2009	-0.192969292402267
2010	-0.201333165168762
2011	-0.176683008670807
2012	-0.262373745441437
2013	-0.27647203207016
2014	-0.256649404764175
2015	-0.319013208150864
2016	-0.272560328245163
2017	-0.26206561923027
2018	-0.286415815353394
2019	-0.414516240358353
2020	-0.482214450836182
2021	-0.490780681371689
2022	-0.490339338779449