Year	Number
2009	1.51885330677032
2010	1.64520108699799
2011	1.94000649452209
2012	1.93440723419189
2013	1.93195283412933
2014	1.9245411157608
2015	1.94708216190338
2016	1.9642106294632
2017	1.92758142948151
2018	1.9365086555481
2019	1.8871865272522
2020	1.91047644615173
2021	1.87737047672272
2022	1.56596922874451