Year	Number
1996	39.1959800720215
1998	35.5
2000	28.8557205200195
2002	21.3930339813232
2003	27.8606967926025
2004	20.6730766296387
2005	25.3588523864746
2006	15.3110046386719
2007	20.5741634368896
2008	24.0384616851807
2009	27.488151550293
2010	24.6445503234863
2011	22.0657272338867
2012	30.046947479248
2013	32.3943672180176
2014	33.1730766296387
2015	30
2016	33.8095245361328
2017	30
2018	27.619047164917
2019	27.1428565979004
2020	20.9523811340332
2021	20.4761905670166
2022	17.9245281219482