Year	Number
1996	0.515013754367828
1998	0.507770359516144
2000	0.540943026542664
2002	0.733767986297607
2003	0.819586336612701
2004	0.692467272281647
2005	0.715097188949585
2006	0.746972680091858
2007	0.595666348934174
2008	0.656967222690582
2009	0.449182033538818
2010	0.445573270320892
2011	0.446406275033951
2012	0.398661673069
2013	0.380482465028763
2014	0.230833724141121
2015	0.208593904972076
2016	0.119783155620098
2017	0.138913422822952
2018	-0.0407781675457954
2019	0.00850539095699787
2020	0.0204948224127293
2021	-0.0907086357474327
2022	-0.185125753283501