Year	Number
1996	-0.281485259532928
1998	-0.161566689610481
2000	-0.218968793749809
2002	-0.218986436724663
2003	-0.0311716701835394
2004	-0.0339414738118649
2005	0.00833530258387327
2006	-0.0863831415772438
2007	-0.0817873626947403
2008	-0.0727424472570419
2009	-0.114246524870396
2010	-0.120654635131359
2011	-0.199520617723465
2012	-0.197661280632019
2013	-0.256315290927887
2014	-0.246708765625954
2015	-0.270693123340607
2016	-0.416637808084488
2017	-0.419679194688797
2018	-0.484441161155701
2019	-0.54049152135849
2020	-0.59102064371109
2021	-0.608309328556061
2022	-0.606529355049133