Year Percent of GDP (Units) 2002 27.243 2003 30.102 2004 35.354 2005 37.048 2006 29.489 2007 55.852 2008 30.222 2009 36.503 2010 30.269 2011 26.407 2012 25.340 2013 23.093 2014 17.460 2015 18.467 2016 19.283 2017 18.481 2018 18.047 2019 18.192 2020 17.011 2021 10.937 2022 7.951