Year	Number
1996	0.776639640331268
1998	0.752557337284088
2000	0.747685492038727
2002	0.796371579170227
2003	0.537254989147186
2004	0.687684059143066
2005	0.716674387454987
2006	0.945923328399658
2007	0.943043947219849
2008	0.898490905761719
2009	1.00920045375824
2010	0.918635427951813
2011	1.07076179981232
2012	1.16282367706299
2013	1.19076550006866
2014	1.45259976387024
2015	1.5005863904953
2016	1.41035568714142
2017	1.40843749046326
2018	1.42625665664673
2019	1.38031601905823
2020	1.28574478626251
2021	1.36593055725098
2022	1.29996228218079