Year Percent of GDP (Units) 1999 38.402 2000 43.562 2001 53.397 2002 60.662 2003 56.221 2004 52.248 2005 43.349 2006 39.550 2007 37.816 2008 34.005 2009 39.727 2010 44.732 2011 51.853 2012 54.429 2013 49.038 2014 47.476 2015 51.176 2016 49.415 2017 44.679 2018 45.900 2019 41.321 2020 43.620 2021 47.547 2022 45.350 2023 41.081 2024 43.794 2025 49.965 2026 57.622 2027 65.991 2028 75.492 2029 85.066