Year Percent 2000 10.18632 2001 11.39351 2002 14.23042 2003 17.09172 2004 19.97785 2005 22.88868 2006 25.82359 2007 28.78298 2008 31.78361 2009 34.8956 2010 38.02617 2011 41.17482 2012 44.34106 2013 47.52402 2014 50.72396 2015 53.93998 2016 57.17156 2017 60.41786 2018 63.68017 2019 66.95742 2020 70.2491 2021 73.55414 2022 76.71942