Year	Number
2000	23
2001	24
2002	24
2003	25
2004	25
2005	24
2006	25
2007	26
2008	26
2009	26
2010	26
2011	27
2012	27
2013	28
2014	28
2015	28
2016	27
2017	27
2018	27
2019	27
2020	26