Year	Number
1997	115000
1998	148000
1999	147000
2000	171000
2001	139000
2002	160000
2003	165000
2004	190000
2005	217000
2006	256000
2007	306000
2008	322000
2009	311000
2010	365000
2011	392000
2012	439000
2013	529000
2014	536000
2015	678000
2016	778000
2017	923000
2018	1053000
2019	1198000
2020	197000