Year	Number
1990	1
1991	1
1992	1
1993	1
1994	1
1995	1
1996	1
1997	2
1998	2
1999	2
2000	2
2001	2
2002	2
2003	2
2004	3
2005	3
2006	3
2007	3
2008	3
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