Year	Number
1996	27.9569892883301
1998	18.7165775299072
2000	14.361701965332
2002	14.2857141494751
2003	17.4603176116943
2004	24.1379318237305
2005	21.9512195587158
2006	23.9024391174316
2007	20.3883495330811
2008	20.8737869262695
2009	19.6172256469727
2010	18.5714282989502
2011	18.9573459625244
2012	17.0616111755371
2013	13.2701425552368
2014	12.9807691574097
2015	13.3333330154419
2016	12.8571424484253
2017	13.8095235824585
2018	13.8095235824585
2019	11.4285717010498
2020	16.1904754638672
2021	16.1904754638672
2022	16.5094337463379