Year	Number
2005	-0.682056784629822
2006	-1.00461208820343
2007	-1.23814690113068
2008	-1.28048145771027
2009	-1.34853112697601
2010	-1.14101254940033
2011	-1.58569324016571
2012	-1.51806282997131
2013	-1.6967955827713
2014	-1.78574573993683
2015	-0.325431674718857
2016	-0.20112381875515
2017	-0.162584394216537
2018	-0.182951793074608
2019	-0.166344985365868
2020	0.11747295409441
2021	0.024143923074007
2022	0.230687335133553