Year	Number
2007	0.0377989783883095
2008	0.0322822406888008
2009	0.0615857057273388
2010	-0.096795879304409
2011	-0.151747062802315
2012	-0.0404839292168617
2013	-0.0409103110432625
2014	-0.161953508853912
2015	-0.319047421216965
2016	-0.215008199214935
2017	-0.151575684547424
2018	-0.343168258666992
2019	-0.387807816267014
2020	-0.320575326681137
2021	-0.288337767124176
2022	-0.389362215995789