Year	Number
2004	0.370109558105469
2005	0.789309144020081
2006	0.775587141513824
2007	0.784966588020325
2008	0.797165334224701
2009	0.832615554332733
2010	0.815264821052551
2011	0.791372001171112
2012	0.77997100353241
2013	0.77830171585083
2014	1.22070860862732
2015	1.15181076526642
2016	1.15955591201782
2017	1.17175841331482
2018	1.17916560173035
2019	1.17659223079681
2020	1.26600527763367
2021	1.2798718214035
2022	1.27020359039307