Year	Number
1996	0.257727921009064
1998	0.419711261987686
2000	0.232365354895592
2002	0.164603292942047
2003	0.153800815343857
2004	0.0255536306649446
2005	-0.00725506478920579
2006	-0.0911425054073334
2007	-0.110541515052319
2008	-0.138752609491348
2009	-0.0277492720633745
2010	-0.039045549929142
2011	-0.0199026539921761
2012	-0.0296867359429598
2013	0.00634712912142277
2014	0.159282863140106
2015	0.147082418203354
2016	0.163444191217422
2017	0.0841742902994156
2018	0.021107655018568
2019	0.0058021922595799
2020	-0.106158271431923
2021	-0.15458419919014
2022	-0.0568434745073318