Year % of total 1990 99.9999983850932 1995 99.999998630137 2000 99.9999978404767 2005 99.9999981366462 2010 99.9999984616526 2011 99.9999985140948 2012 99.9999985418643 2013 99.9999984847123 2014 8.39573182458263E-08 2015 6.87120465177289E-08 2016 0 2017 0