Year	Number
1996	9.78260898590088
1998	8.69565200805664
2000	7.60869550704956
2002	16.7567558288574
2003	18.9189186096191
2004	20.8955230712891
2005	20.5882358551025
2006	20.5882358551025
2007	22.3300971984863
2008	24.2718448638916
2009	33.9712905883789
2010	39.2344512939453
2011	40.7582931518555
2012	38.8625602722168
2013	38.8625602722168
2014	49.038459777832
2015	47.1428565979004
2016	42.3809509277344
2017	36.1904754638672
2018	43.8095245361328
2019	43.3333320617676
2020	41.4285697937012
2021	40.476188659668
2022	43.3962249755859