Year Percent of GDP (Units) 1995 69.375 1996 63.507 1997 69.100 1998 61.283 1999 63.347 2000 82.103 2001 71.082 2002 65.964 2003 57.778 2004 53.444 2005 47.614 2006 15.937 2007 13.426 2008 8.054 2009 12.600 2010 12.066 2011 12.027 2012 14.431 2013 15.305 2014 17.218 2015 25.890 2016 29.465 2017 32.348 2018 34.107 2019 35.921 2020 41.023 2021 45.062 2022 45.608 2023 48.638 2024 46.790 2025 45.850 2026 45.300 2027 45.010 2028 44.689 2029 44.382