Year	Number
1996	30.6010932922363
1998	25.6830596923828
2000	26.7759571075439
2002	23.2432441711426
2003	29.1891899108887
2004	31.8407955169678
2005	38.235294342041
2006	31.7073173522949
2007	38.3495140075684
2008	37.8640785217285
2009	34.9282302856445
2010	35.8851661682129
2011	38.8625602722168
2012	34.5971565246582
2013	34.5971565246582
2014	28.8461532592773
2015	30.4761905670166
2016	34.761905670166
2017	33.3333320617676
2018	43.3333320617676
2019	42.8571434020996
2020	47.1428565979004
2021	42.8571434020996
2022	44.3396224975586