Year	Number
1996	9.04255294799805
1998	21.8085098266602
2000	14.8148145675659
2002	14.2857141494751
2003	9.54773902893066
2004	11.1650485992432
2005	12.62135887146
2006	12.5603866577148
2007	11.5942029953003
2008	13.4615383148193
2009	14.6919431686401
2010	16.5876770019531
2011	15.6398105621338
2012	18.4834117889404
2013	26.0663509368896
2014	30.9523811340332
2015	28.5714282989502
2016	30.4761905670166
2017	30
2018	30.1886787414551
2019	23.5849056243896
2020	23.1132068634033
2021	23.5849056243896
2022	23.1132068634033