Year Percent of GDP (Units) 1995 21.593 1996 30.636 1997 32.989 1998 33.917 1999 47.050 2000 50.452 2001 51.112 2002 45.297 2003 43.242 2004 41.715 2005 34.732 2006 31.427 2007 30.345 2008 28.599 2009 36.361 2010 40.615 2011 43.156 2012 51.729 2013 54.693 2014 53.493 2015 51.685 2016 52.275 2017 51.461 2018 49.408 2019 47.978 2020 58.851 2021 61.082 2022 57.803 2023 57.855 2024 59.294 2025 60.257 2026 63.480 2027 66.702 2028 69.746 2029 72.438