Year	Number
1996	14.8936166763306
1998	10.638298034668
2000	18.518518447876
2002	20.1058197021484
2003	29.1457290649414
2004	26.2135925292969
2005	35.9223289489746
2006	40.0966186523438
2007	46.8599052429199
2008	49.038459777832
2009	43.1279602050781
2010	51.6587677001953
2011	54.9763031005859
2012	51.1848335266113
2013	57.3459701538086
2014	46.6666679382324
2015	58.0952377319336
2016	56.6666679382324
2017	62.3809509277344
2018	62.2641525268555
2019	60.3773574829102
2020	60.8490562438965
2021	59.4339637756348
2022	58.9622650146484