Year	Number
1996	-0.0449785143136978
1998	0.0752126201987267
2000	0.000209700621780939
2002	-0.456774443387985
2003	-0.0737013816833496
2004	-0.234758883714676
2005	-0.132929384708405
2006	-0.762317538261414
2007	-0.300741791725159
2008	-0.370714008808136
2009	-0.356457054615021
2010	-0.312492519617081
2011	-0.513562262058258
2012	-0.523977637290955
2013	-0.6063152551651
2014	-0.540025532245636
2015	-0.606864869594574
2016	-0.496246248483658
2017	-0.434904038906097
2018	-0.379783809185028
2019	-0.274439603090286
2020	-0.267881631851196
2021	-0.315793395042419
2022	-0.296307682991028