Year	Number
2000	14000
2001	15000
2002	15000
2003	16000
2004	17000
2005	18000
2006	18000
2007	19000
2008	20000
2009	20000
2010	20000
2011	21000
2012	21000
2013	21000
2014	22000
2015	22000
2016	22000
2017	23000
2018	23000
2019	23000
2020	24000