Year	Number
1996	21.2765960693359
1998	23.4042549133301
2000	17.9894180297852
2002	21.6931209564209
2003	22.1105518341064
2004	18.9320392608643
2005	25.2427177429199
2006	30.917875289917
2007	37.1980667114258
2008	31.25
2009	21.8009471893311
2010	33.1753540039063
2011	31.7535552978516
2012	33.1753540039063
2013	13.7440757751465
2014	4.2857141494751
2015	2.38095235824585
2016	4.2857141494751
2017	3.80952382087708
2018	3.30188679695129
2019	5.18867921829224
2020	9.43396186828613
2021	8.49056625366211
2022	2.35849046707153