Year % 2000 22.466 2001 21.417 2002 24.803 2003 25.307 2004 24.814 2005 24.261 2006 26.531 2007 25.78 2008 25.008 2009 27.864 2010 28.077 2011 28.572 2012 28.58 2013 28.064 2014 28.932 2015 31.223 2016 31.179 2017 29.12 2018 31.037 2019 32.561 2020 31.792 2021 30.275 2022 29.876