Year % change from 1990 1991 -0.626022987810038 1992 2.6565697772692 1993 8.05395174701835 1994 0.754805877902598 1995 5.26137019690385 1996 5.9548997092262 1997 7.01595117589335 1998 21.8204310091889 1999 12.5468224677243 2000 9.39903141711469 2001 11.1066121376917 2002 12.6087070110891 2003 21.2576705790593 2004 28.5730636323317 2005 31.9615223689097 2006 14.2386300849463 2007 17.1755198588714 2008 18.2663736343659 2009 17.7259173098679 2010 23.7609708567262 2011 25.3171394758493 2012 26.8733080949725