Year	Number
1996	57.5268821716309
1998	54.5454559326172
2000	52.6595726013184
2002	51.3227500915527
2003	44.9735450744629
2004	42.8571434020996
2005	48.2926826477051
2006	40.9756088256836
2007	49.5145645141602
2008	50
2009	52.6315803527832
2010	52.8571434020996
2011	50.7108993530273
2012	46.445499420166
2013	44.5497627258301
2014	41.8269233703613
2015	36.1904754638672
2016	30.9523811340332
2017	29.5238094329834
2018	31.9047622680664
2019	30.4761905670166
2020	32.8571434020996
2021	31.9047622680664
2022	30.6603775024414