Year	Number
1996	31.6939888000488
1998	24.0437164306641
2000	23.4972686767578
2002	19.4594593048096
2003	21.6216220855713
2004	14.9253730773926
2005	19.6078433990479
2006	19.5121955871582
2007	18.9320392608643
2008	19.4174766540527
2009	13.3971290588379
2010	14.3540668487549
2011	11.3744077682495
2012	8.05687236785889
2013	10.4265403747559
2014	6.25
2015	1.90476191043854
2016	1.42857146263123
2017	1.42857146263123
2018	0.476190477609634
2019	0.476190477609634
2020	0
2021	0.476190477609634
2022	0.471698105335236