Year	Number
2000	32000
2001	33000
2002	34000
2003	34000
2004	33000
2005	30000
2006	28000
2007	26000
2008	25000
2009	24000
2010	21000
2011	20000
2012	19000
2013	18000
2014	17000
2015	16000
2016	15000
2017	14000
2018	13000
2019	13000
2020	12000