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