Year Percent of GDP 2000 29.412 2001 27.192 2002 27.318 2003 24.024 2004 20.981 2005 17.545 2006 12.536 2007 12.431 2008 13.004 2009 22.452 2010 30.861 2011 34.229 2012 37.841 2013 39.026 2014 40.494 2015 39.352 2016 38.875 2017 36.861 2018 36.602 2019 37.992 2020 39.697 2021 41.471 2022 43.339 2023 44.973 2024 46.23