Year	Number
1996	3.82513666152954
1998	2.7322404384613
2000	3.27868843078613
2002	3.78378367424011
2003	5.40540552139282
2004	12.93532371521
2005	12.7450981140137
2006	18.536584854126
2007	8.73786449432373
2008	16.990291595459
2009	12.4401912689209
2010	11.9617223739624
2011	11.8483409881592
2012	23.6966819763184
2013	24.1706161499023
2014	17.3076915740967
2015	14.2857141494751
2016	21.4285717010498
2017	18.5714282989502
2018	13.3333330154419
2019	12.380952835083
2020	5.7142858505249
2021	6.1904764175415
2022	6.13207530975342