Year	Number
1996	0.659302592277527
1998	0.663797557353973
2000	0.630551934242249
2002	0.610876262187958
2003	0.276081532239914
2004	0.29008686542511
2005	-0.224626928567886
2006	0.184131041169167
2007	0.121460936963558
2008	0.0983418449759483
2009	-0.154777318239212
2010	-0.159897983074188
2011	0.108835898339748
2012	0.181172475218773
2013	0.195707112550735
2014	0.385206580162048
2015	0.37784206867218
2016	0.335442960262299
2017	0.638752341270447
2018	0.699863374233246
2019	0.688096284866333
2020	0.61318838596344
2021	0.443210333585739
2022	0.388570487499237