Year	Number
1996	25.543478012085
1998	22.2826080322266
2000	22.2826080322266
2002	18.9189186096191
2003	13.5135135650635
2004	8.4577112197876
2005	15.6862745285034
2006	14.7058820724487
2007	9.70873832702637
2008	13.1067962646484
2009	7.17703342437744
2010	6.69856452941895
2011	8.53080558776855
2012	9.95260620117188
2013	9.47867298126221
2014	16.3461532592773
2015	20
2016	13.8095235824585
2017	14.2857141494751
2018	10.9523811340332
2019	9.5238094329834
2020	10.4761905670166
2021	12.8571424484253
2022	16.5094337463379