Year Percent of GDP (Units) 1992 17.989 1993 39.561 1994 27.105 1995 29.383 1996 35.062 1997 31.834 1998 35.130 1999 33.642 2000 32.852 2001 30.617 2002 34.627 2003 31.538 2004 29.406 2005 28.069 2006 24.715 2007 24.834 2008 26.485 2009 27.476 2010 26.405 2011 23.652 2012 23.929 2013 25.227 2014 24.865 2015 24.567 2016 23.304 2017 22.329 2018 24.644 2019 27.115 2020 28.714 2021 30.485 2022 34.811 2023 33.755 2024 32.503 2025 31.665 2026 31.808 2027 31.955 2028 31.942 2029 31.944