Year	Number of
2000	26000
2001	27000
2002	26000
2003	25000
2004	25000
2005	26000
2006	27000
2007	25000
2008	27000
2009	28000
2010	29000
2011	30000
2012	29000
2013	27000
2014	26000
2015	27000
2016	20000
2017	14000
2018	12000
2019	11000
2020	12000