Year	Number
1996	1
1998	1
2000	1
2002	1
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	3
2017	3
2018	4
2019	4
2020	4
2021	4
2022	4