Year Percent of GDP (Units) 1998 11.037 1999 11.347 2000 13.226 2001 12.747 2002 10.089 2003 9.349 2004 10.756 2005 11.654 2006 11.905 2007 12.419 2008 14.414 2009 17.660 2010 22.411 2011 28.456 2012 31.867 2013 32.028 2014 32.056 2015 33.552 2016 33.474 2017 34.500 2018 33.009 2019 32.285 2020 32.285 2021 32.285 2022 32.285 2023 32.285 2024 32.285 2025 32.285 2026 32.285 2027 32.285 2028 32.285 2029 32.285