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