Year	Number
2003	1
2004	1
2005	1
2006	1
2007	1
2008	1
2009	2
2010	2
2011	1
2012	1
2013	1
2014	1
2015	2
2016	2
2017	2
2018	2
2019	3
2020	3
2021	4
2022	4