Year per Person 1997 73.28573 1998 74.39267 1999 73.8429 2000 74.37358 2001 74.45959 2002 76.55482 2003 75.91815 2004 75.1603 2005 74.40808 2006 74.08962 2007 74.91973 2008 74.17142 2009 73.3328 2010 72.2789 2011 64.40473 2012 43.85652 2013 49.23434 2014 48.17181 2015 48.80378 2016 48.15781