Year Percent of GDP (Units) 1994 78.366 1995 76.671 1996 65.034 1997 60.194 1998 58.138 1999 55.431 2000 53.854 2001 58.077 2002 57.231 2003 56.732 2004 59.027 2005 59.555 2006 54.943 2007 47.623 2008 40.192 2009 40.148 2010 39.095 2011 36.510 2012 34.764 2013 34.372 2014 35.312 2015 34.743 2016 34.073 2017 33.995 2018 36.008 2019 40.253 2020 61.974 2021 55.583 2022 53.678 2023 52.193 2024 54.148 2025 55.054 2026 54.322 2027 53.038 2028 51.869 2029 50.836