Year	Number
1996	-0.119933769106865
1998	-0.219085738062859
2000	0.0335262566804886
2002	-0.0885787010192871
2003	-0.290672481060028
2004	-0.351197212934494
2005	-0.211272329092026
2006	0.0275784749537706
2007	0.0862749591469765
2008	-0.0305091328918934
2009	-0.124868348240852
2010	-0.102774083614349
2011	-0.0901554822921753
2012	-0.0900087654590607
2013	-0.134330868721008
2014	-0.308061718940735
2015	-0.319261193275452
2016	-0.25353330373764
2017	-0.186972558498383
2018	-0.319894850254059
2019	-0.290070623159409
2020	-0.196662068367004
2021	-0.176314115524292
2022	-0.0625455379486084