Year	Number
1996	18.032787322998
1998	18.5792350769043
2000	16.3934421539307
2002	12.4324321746826
2003	23.2432441711426
2004	18.9054718017578
2005	14.2156858444214
2006	14.6341466903687
2007	16.5048542022705
2008	13.1067962646484
2009	14.3540668487549
2010	13.8755979537964
2011	15.1658763885498
2012	21.3270149230957
2013	15.1658763885498
2014	15.384614944458
2015	8.09523773193359
2016	8.5714282989502
2017	13.3333330154419
2018	13.3333330154419
2019	13.3333330154419
2020	11.9047622680664
2021	12.8571424484253
2022	14.1509437561035