Year	Number
2000	37000
2001	34000
2002	34000
2003	31000
2004	32000
2005	31000
2006	30000
2007	29000
2008	29000
2009	27000
2010	26000
2011	26000
2012	24000
2013	23000
2014	22000
2015	21000
2016	21000
2017	20000
2018	18000
2019	17000
2020	17000