Year	Number
1996	25
1998	30.348258972168
2000	30.8457717895508
2002	26.8656711578369
2003	25.3731346130371
2004	23.0769233703613
2005	23.0769233703613
2006	18.269229888916
2007	19.7115383148193
2008	15.865385055542
2009	16.5876770019531
2010	15.6398105621338
2011	15.962441444397
2012	15.4929580688477
2013	15.023473739624
2014	13.3004922866821
2015	10.837438583374
2016	11.822660446167
2017	12.3152713775635
2018	13.1067962646484
2019	12.5603866577148
2020	13.043478012085
2021	12.5603866577148
2022	14.4927539825439