Year	annual % growth
1996	0.678549207372228
1997	2.94893225099118
1998	1.88372835192494
1999	3.44337497202048
2000	1.80669935626301
2001	1.9953654050795
2002	2.33008556079785
2003	2.36086573157715
2004	3.67779837505138
2005	4.15187066973401
2006	4.36047100079465
2007	4.41442559311578
2008	4.44889994819097
2009	4.50681073548147
2010	2.54966381934642
2011	3.15114620866517
2012	3.34592480713989
2013	2.59960040312626
2014	2.20409786382805
2015	1.78426239855347
2016	2.42722199578256
2017	3.35094063014212