Year	Number
2000	26000
2001	28000
2002	29000
2003	30000
2004	30000
2005	29000
2006	27000
2007	26000
2008	25000
2009	24000
2010	23000
2011	22000
2012	20000
2013	18000
2014	16000
2015	14000
2016	13000
2017	12000
2018	12000
2019	13000
2020	13000