Year	Number
2008	0.636225163936615
2009	0.731945872306824
2010	0.62224006652832
2011	0.671461880207062
2012	0.799263954162598
2013	0.780824780464172
2014	0.77688866853714
2015	0.444215655326843
2016	0.433415442705154
2017	0.445771485567093
2018	0.451349467039108
2019	0.457674026489258
2020	0.482409477233887
2021	0.483743727207184
2022	0.455944806337357