Year	Number
1990	3
1991	3
1992	3
1993	3
1994	3
1995	3
1996	2
1997	2
1998	2
1999	2
2000	2
2001	2
2002	2
2003	2
2004	2
2005	2
2006	2
2007	2
2008	2
2009	2
2010	2
2011	2
2012	2
2013	2
2014	2
2015	2
2016	2
2017	2
2018	2
2019	1
2020	1
2021	1
2022	1