Year	Number
1996	15.8469944000244
1998	20.7650279998779
2000	17.4863395690918
2002	14.5945949554443
2003	10.2702703475952
2004	6.46766185760498
2005	10.2941179275513
2006	11.7073173522949
2007	16.019416809082
2008	13.1067962646484
2009	11.9617223739624
2010	13.3971290588379
2011	12.7962083816528
2012	11.8483409881592
2013	12.7962083816528
2014	13.942307472229
2015	12.380952835083
2016	13.3333330154419
2017	13.3333330154419
2018	11.9047622680664
2019	12.380952835083
2020	11.4285717010498
2021	12.8571424484253
2022	11.3207550048828