Year	Number
2011	2.84360194206238
2012	6.16113758087158
2013	5.21327018737793
2014	4.32692289352417
2015	3.33333325386047
2016	2.85714292526245
2017	2.85714292526245
2018	2.38095235824585
2019	2.85714292526245
2020	2.38095235824585
2021	2.38095235824585
2022	0.943396210670471