Year Percent of GDP (Units) 1997 26.234 1998 24.012 1999 24.146 2000 32.455 2001 28.754 2002 31.951 2003 37.794 2004 30.449 2005 29.709 2006 32.163 2007 24.436 2008 33.921 2009 19.411 2010 24.902 2011 22.293 2012 24.057 2013 25.111 2014 21.354 2015 23.889 2016 24.386 2017 22.516 2018 24.113 2019 26.530 2020 22.321 2021 28.863 2022 28.906 2023 25.919 2024 14.912 2025 14.419 2026 14.225 2027 14.532 2028 14.994 2029 15.491