Year	Number
1996	54.3010749816895
1998	52.9411773681641
2000	57.4468078613281
2002	60.3174591064453
2003	58.7301597595215
2004	54.679801940918
2005	51.2195129394531
2006	51.2195129394531
2007	49.5145645141602
2008	37.8640785217285
2009	38.7559814453125
2010	29.5238094329834
2011	32.2274894714355
2012	34.5971565246582
2013	39.8104248046875
2014	42.788459777832
2015	42.8571434020996
2016	36.1904754638672
2017	30.9523811340332
2018	24.761905670166
2019	23.3333339691162
2020	20.9523811340332
2021	21.9047622680664
2022	21.698112487793