Year	Number
2008	-0.606421053409576
2009	-0.551011800765991
2010	-0.854167401790619
2011	-0.582938611507416
2012	-0.557751059532166
2013	-0.578649342060089
2014	-0.568305134773254
2015	0.134022355079651
2016	0.20077309012413
2017	0.232526183128357
2018	0.23295870423317
2019	0.227962121367455
2020	0.386291533708572
2021	0.370898455381393
2022	0.449828535318375