Year annual % growth 1994 0.509179414912268 1995 0.996913297016874 1996 0.619003363308892 1997 2.89023480357045 1998 1.91894076884616 1999 3.32812730187062 2000 1.67638844865662 2001 1.96688081233067 2002 2.53789140621595 2003 2.39691204422823 2004 4.28393469086701 2005 4.28943178384267 2006 4.89949184017868 2007 5.2472278041507 2008 4.49268737408633 2009 4.37543346135543 2010 2.77875797650584 2011 3.52426523602153 2012 3.59095503671239 2013 2.34745144518543 2014 2.0525481097509 2015 1.76156460443902 2016 2.14224271897672 2017 3.27244460982719