Year annual % growth 1996 7.09547450900287 1997 3.90467506866426 1998 4.18201663216982 1999 1.20305106465648 2000 11.6349765146189 2001 1.31437764438706 2002 6.03064528550212 2003 7.24810830573814 2004 12.4178639367364 2005 8.64628436266656 2006 8.51553081194008 2007 5.80203842076699 2008 4.59110183262477 2009 -8.35125418171778 2010 9.78840585151563 2011 6.45842287398879 2012 3.24941128930689 2013 2.29600102196139 2014 2.60526709772329 2015 2.32352775110982 2016 4.11276301843687 2017 7.28208938366302