Year	Number
2008	3.39805817604065
2009	4.30622005462646
2010	3.34928226470947
2011	3.3175356388092
2012	2.36966824531555
2013	1.89573454856873
2014	1.92307686805725
2015	25.238094329834
2016	26.6666660308838
2017	23.8095245361328
2018	27.619047164917
2019	41.4285697937012
2020	42.3809509277344
2021	44.761905670166
2022	43.8679237365723