Year	Number
1996	25
1998	24.8756217956543
2000	25.3731346130371
2002	26.8656711578369
2003	23.3830852508545
2004	22.115385055542
2005	18.75
2006	21.634614944458
2007	21.634614944458
2008	21.1538467407227
2009	22.274881362915
2010	21.8009471893311
2011	22.0657272338867
2012	20.1877937316895
2013	19.7183094024658
2014	18.7192115783691
2015	18.2266006469727
2016	18.2266006469727
2017	15.7635469436646
2018	13.5922327041626
2019	15.4589376449585
2020	12.5603866577148
2021	10.6280193328857
2022	13.043478012085