Year Percent of GDP (Units) 1991 27.628 1992 25.702 1993 26.668 1994 25.943 1995 26.577 1996 26.677 1997 24.530 1998 24.176 1999 24.009 2000 24.044 2001 23.988 2002 24.125 2003 23.473 2004 23.021 2005 23.039 2006 22.852 2007 23.319 2008 23.670 2009 24.638 2010 23.999 2011 27.887 2012 28.349 2013 30.798 2014 27.687 2015 27.444 2016 27.213 2017 28.725 2018 28.685 2019 29.532 2020 34.495 2021 33.293 2022 35.175 2023 34.113 2024 32.967 2025 32.218 2026 31.687 2027 31.670 2028 31.755 2029 32.045