Year	Number
1996	-0.121130093932152
1998	-0.0635435581207275
2000	-0.468696683645248
2002	-0.62615978717804
2003	-0.539445102214813
2004	-0.367069929838181
2005	-0.351528733968735
2006	-0.517649948596954
2007	-0.506612956523895
2008	-0.424041241407394
2009	-0.434595018625259
2010	-0.357611089944839
2011	-0.327680468559265
2012	-0.32300740480423
2013	-0.369572550058365
2014	-0.244262471795082
2015	-0.371577143669128
2016	-0.510394036769867
2017	-0.435822159051895
2018	-0.433740764856339
2019	-0.450450360774994
2020	-0.501107096672058
2021	-0.35713204741478
2022	-0.286658674478531