Year	Number
1996	0.216309443116188
1998	0.238909855484962
2000	0.227800235152245
2002	0.2301404774189
2003	0.2629454433918
2004	-0.138781785964966
2005	0.294559240341187
2006	0.1922507584095
2007	0.273236155509949
2008	0.357458859682083
2009	0.338911116123199
2010	0.300518751144409
2011	0.308373779058456
2012	0.344245105981827
2013	0.292244523763657
2014	0.476412117481232
2015	-0.122392892837524
2016	-0.0870688557624817
2017	0.0038483995012939
2018	-0.184301629662514
2019	-0.284158378839493
2020	-0.169316709041595
2021	-0.0398654863238335
2022	-0.0289409626275301