Year	Number
2004	52.7363166809082
2005	40.6862754821777
2006	23.0392150878906
2007	21.3592224121094
2008	15.5339803695679
2009	15.7894735336304
2010	11.4832534790039
2011	10.4265403747559
2012	9.47867298126221
2013	8.53080558776855
2014	21.1538467407227
2015	27.619047164917
2016	30
2017	23.3333339691162
2018	34.2857131958008
2019	37.1428565979004
2020	40.476188659668
2021	41.9047622680664
2022	47.6415100097656