Year	Number
1996	6.01092910766602
1998	6.01092910766602
2000	10.382513999939
2002	3.78378367424011
2003	12.4324321746826
2004	9.45273590087891
2005	15.6862745285034
2006	25.8536586761475
2007	16.019416809082
2008	20.3883495330811
2009	24.4019145965576
2010	23.4449768066406
2011	19.9052124023438
2012	21.8009471893311
2013	18.0094795227051
2014	36.538459777832
2015	34.2857131958008
2016	34.2857131958008
2017	36.1904754638672
2018	38.5714302062988
2019	39.523811340332
2020	41.4285697937012
2021	37.1428565979004
2022	43.3962249755859