Year	Number
1996	0.226543545722961
1998	0.249043971300125
2000	0.217144221067429
2002	-0.0244121737778187
2003	0.0618866458535194
2004	-0.189794227480888
2005	-0.0545144379138947
2006	-0.0254304427653551
2007	-0.171447739005089
2008	-0.0302958749234676
2009	-0.0469018258154392
2010	0.29281359910965
2011	0.321024298667908
2012	0.336211621761322
2013	0.458545207977295
2014	0.663734495639801
2015	0.661673128604889
2016	0.642764985561371
2017	0.603064239025116
2018	0.654241681098938
2019	0.636282980442047
2020	0.689669668674469
2021	0.783069550991058
2022	0.839519560337067