Year	Number
1996	0.545951545238495
1998	0.570708155632019
2000	0.59229052066803
2002	0.694714844226837
2003	0.791487634181976
2004	0.549316823482513
2005	0.374254941940308
2006	0.334428995847702
2007	0.336277306079865
2008	0.562798917293549
2009	0.575691282749176
2010	0.600197672843933
2011	0.606024205684662
2012	0.579943299293518
2013	0.6009162068367
2014	0.577941358089447
2015	1.14189267158508
2016	1.10083138942719
2017	0.849183261394501
2018	0.860554039478302
2019	1.17598176002502
2020	1.38863289356232
2021	1.60045492649078
2022	1.69814908504486