Year	Number
1996	0.125683024525642
1998	0.32502093911171
2000	0.640210628509521
2002	0.410248696804047
2003	0.29903855919838
2004	0.408170908689499
2005	0.325625747442245
2006	0.220006227493286
2007	0.30284458398819
2008	0.261874705553055
2009	0.140438765287399
2010	0.299279242753983
2011	0.384890913963318
2012	0.293291419744492
2013	0.330102741718292
2014	0.149542808532715
2015	0.0152472918853164
2016	-0.110105983912945
2017	-0.105891399085522
2018	-0.257414042949677
2019	-0.0751413851976395
2020	-0.0658019334077835
2021	-0.0757728293538094
2022	0.0698951333761215