Year	Number
1996	1.03555142879486
1998	1.11396324634552
2000	1.22359979152679
2002	0.729621529579163
2003	0.918948590755463
2004	1.03930127620697
2005	0.754638612270355
2006	0.962325036525726
2007	0.877260088920593
2008	0.81338632106781
2009	0.818449318408966
2010	0.840972781181335
2011	0.722605228424072
2012	0.809086382389069
2013	0.777999877929688
2014	0.350779145956039
2015	0.855819821357727
2016	0.871190190315247
2017	0.762864291667938
2018	0.833078503608704
2019	0.8595210313797
2020	0.874160885810852
2021	0.894233107566834
2022	0.929428398609161