Year	Number
1996	21.5053768157959
1998	25.6684494018555
2000	29.7872333526611
2002	25.9259262084961
2003	41.798942565918
2004	35.9605903625488
2005	38.5365867614746
2006	42.926830291748
2007	38.8349533081055
2008	41.262134552002
2009	50.2392349243164
2010	49.523811340332
2011	51.1848335266113
2012	42.6540298461914
2013	45.497631072998
2014	43.269229888916
2015	41.4285697937012
2016	33.3333320617676
2017	37.1428565979004
2018	32.3809509277344
2019	33.8095245361328
2020	30.9523811340332
2021	32.8571434020996
2022	27.8301887512207