Year	Number
1996	0.478682190179825
1998	0.562503397464752
2000	0.5645592212677
2002	0.981545209884644
2003	0.76597386598587
2004	0.770029485225677
2005	0.500354409217834
2006	0.426627278327942
2007	0.364861726760864
2008	0.412061005830765
2009	0.304186642169952
2010	0.298077821731567
2011	0.078883208334446
2012	-0.197435706853867
2013	-0.195034772157669
2014	-0.246068090200424
2015	-0.254954397678375
2016	-0.297969162464142
2017	-0.359839290380478
2018	-0.316699147224426
2019	-0.159434482455254
2020	-0.0917352288961411
2021	-0.0562744364142418
2022	0.127030700445175