Year	Number
1996	2
1998	2
2000	2
2002	2
2003	2
2004	2
2005	2
2006	2
2007	2
2008	2
2009	3
2010	3
2011	3
2012	3
2013	3
2014	2
2015	2
2016	2
2017	2
2018	2
2019	2
2020	2
2021	2
2022	2