Year	Number
1997	8
1998	14
1999	13
2002	12
2003	10
2004	11
2005	15
2006	18
2007	32
2008	10
2009	14
2010	7
2011	28
2012	10
2013	8
2014	17
2015	12
2016	15
2017	7
2018	7
2019	11
2020	19
2021	27