Year	Number
1996	30.6010932922363
1998	30.0546455383301
2000	30.0546455383301
2002	21.0810813903809
2003	15.1351346969604
2004	13.4328355789185
2005	10.2941179275513
2006	16.0975608825684
2007	17.9611644744873
2008	19.9029121398926
2009	17.7033500671387
2010	21.5311012268066
2011	22.274881362915
2012	22.274881362915
2013	26.0663509368896
2014	37.980770111084
2015	32.8571434020996
2016	36.6666679382324
2017	36.1904754638672
2018	23.3333339691162
2019	20
2020	23.8095245361328
2021	30.9523811340332
2022	30.1886787414551