Year	Number
1996	-0.163303330540657
1998	-0.263509094715118
2000	-0.195145681500435
2002	0.182221665978432
2003	-0.167679190635681
2004	-0.297835916280746
2005	-0.103524342179298
2006	-0.195399954915047
2007	-0.169473513960838
2008	-0.0146756879985332
2009	-0.0205527171492577
2010	0.0369552858173847
2011	-0.312528073787689
2012	-0.045678298920393
2013	-0.0272163189947605
2014	0.0818553864955902
2015	0.0216389410197735
2016	0.198666751384735
2017	0.331796050071716
2018	0.32981076836586
2019	0.246477007865906
2020	0.240839511156082
2021	0.282737106084824
2022	0.35694831609726