Year	Number
1996	0.48545891046524
1998	0.187779128551483
2000	0.209914907813072
2002	0.486781418323517
2003	0.598321139812469
2004	0.574418246746063
2005	0.529817044734955
2006	0.654658257961273
2007	0.42527824640274
2008	0.521047174930573
2009	0.619090795516968
2010	0.722773253917694
2011	0.689273953437805
2012	0.828348100185394
2013	0.879969239234924
2014	0.951694786548615
2015	1.05424880981445
2016	0.966515302658081
2017	0.865767598152161
2018	1.00042855739594
2019	1.06583380699158
2020	0.838279902935028
2021	0.834164917469025
2022	0.691895127296448