Year % change from 1990 1991 -3.58435374596372 1992 3.12376338265594 1993 5.7009777143652 1994 8.98652809345917 1995 13.3302532691478 1996 16.5537144093885 1997 21.7086054089772 1998 24.3219389077586 1999 29.3990757951727 2000 34.9315309799541 2001 34.7106338462038 2002 37.8157596255553 2003 43.7368702849451 2004 48.2129183822269 2005 55.3913596235148 2006 65.9071854603088 2007 82.7206121359565 2008 78.5516858726063 2009 79.5458655380907 2010 83.2682901473188 2011 85.3771706718034 2012 87.4860472140644