Year	Number
1995	4520000
1996	5061000
1997	5324000
1998	8426000
1999	9232000
2000	10473000
2001	12133000
2002	16602000
2003	20222000
2004	28853000
2005	31026000
2006	34524000
2007	40954000
2008	45844000
2009	47656000
2010	57386000
2011	70250000
2012	83182000
2013	98185000
2014	116593000
2015	127860000
2016	135130000
2017	143035000
2018	149720000
2019	154632000
2020	20334000