Year	Number
2011	26.2910804748535
2012	16.4319248199463
2013	15.023473739624
2014	9.35960578918457
2015	10.3448276519775
2016	5.9113302230835
2017	5.9113302230835
2018	4.36893224716187
2019	4.34782600402832
2020	5.31400966644287
2021	8.69565200805664
2022	9.17874431610107