Year	Number
1996	17.021276473999
1998	13.297872543335
2000	13.2275133132935
2002	20.1058197021484
2003	22.1105518341064
2004	18.9320392608643
2005	18.4466018676758
2006	17.8743953704834
2007	24.6376819610596
2008	29.8076915740967
2009	28.9099521636963
2010	25.5924167633057
2011	24.6445503234863
2012	29.8578205108643
2013	36.4928894042969
2014	52.3809509277344
2015	46.6666679382324
2016	47.1428565979004
2017	46.6666679382324
2018	48.113208770752
2019	37.2641525268555
2020	35.8490562438965
2021	41.0377349853516
2022	36.3207550048828