Year	Number
1996	14.6739130020142
1998	16.8478260040283
2000	30.4347820281982
2002	25.4054050445557
2003	21.0810813903809
2004	19.9004974365234
2005	15.1960783004761
2006	19.6078433990479
2007	17.9611644744873
2008	17.4757289886475
2009	20.5741634368896
2010	20.0956935882568
2011	24.6445503234863
2012	27.962085723877
2013	29.8578205108643
2014	36.0576934814453
2015	34.761905670166
2016	30.4761905670166
2017	29.5238094329834
2018	25.238094329834
2019	26.1904754638672
2020	25.238094329834
2021	26.1904754638672
2022	28.7735843658447