Year Percent of GDP (Units) 2000 14.026 2001 15.763 2002 19.157 2003 46.595 2004 31.639 2005 32.210 2006 29.925 2007 26.028 2008 27.948 2009 29.859 2010 30.195 2011 31.863 2012 36.306 2013 39.047 2014 37.553 2015 37.211 2016 38.500 2017 40.303 2018 41.418 2019 43.391 2020 57.495 2021 49.463 2022 46.636 2023 47.568 2024 46.562 2025 45.945 2026 44.435 2027 42.820 2028 40.995 2029 39.152