Year % gross 2000 92.8933792114258 2001 91.3380584716797 2002 90.5536804199219 2003 90.9759216308594 2004 90.3658981323242 2005 90.791862487793 2006 91.4224700927734 2007 91.7400436401367 2008 92.5653533935547 2009 93.6392517089844 2010 93.5976867675781 2011 95.9189834594727 2012 96.3543701171875 2013 96.4402008056641 2014 96.0498580932617 2015 97.8695907592773 2016 97.1229782104492 2017 96.0312194824219 2018 95.6989212036133 2019 95.1484680175781 2020 93.4351272583008 2021 93.6936187744141 2022 91.5009384155273