Year	Number
2000	23000
2001	23000
2002	24000
2003	25000
2004	25000
2005	27000
2006	26000
2007	27000
2008	26000
2009	27000
2010	28000
2011	27000
2012	27000
2013	26000
2014	28000
2015	30000
2016	29000
2017	29000
2018	29000
2019	26000
2020	26000