Year	Number
1996	37.5
1998	35.3233833312988
2000	39.3034820556641
2002	39.3034820556641
2003	38.3084564208984
2004	44.711540222168
2005	41.3461532592773
2006	30.2884616851807
2007	25
2008	25.480770111084
2009	26.5402851104736
2010	26.5402851104736
2011	24.8826293945313
2012	26.7605628967285
2013	25.3521118164063
2014	21.674877166748
2015	22.660099029541
2016	22.660099029541
2017	22.1674880981445
2018	21.3592224121094
2019	18.8405799865723
2020	20.2898559570313
2021	22.7053146362305
2022	25.1207733154297