Year % change from 1990 1991 4.29993998532974 1992 8.06345254765979 1993 12.4215548986048 1994 13.8496817740633 1995 16.7251994932094 1996 17.9966213963413 1997 20.9995776745427 1998 18.3029925833722 1999 28.3610067646165 2000 33.2047833914957 2001 35.9925018708277 2002 46.5480450776857 2003 55.4228070565397 2004 61.1912541584239 2005 77.6704675957827 2006 84.2498536679337 2007 86.0906740166115 2008 92.6511665814606 2009 88.547941348626 2010 88.7779975845947 2011 90.6657775604407 2012 92.5535575362866