Year Percent of GDP (Units) 1990 23.242 1991 22.790 1992 23.040 1993 22.633 1994 22.059 1995 22.552 1996 22.706 1997 22.621 1998 22.296 1999 21.675 2000 22.177 2001 22.687 2002 22.031 2003 21.803 2004 22.866 2005 24.817 2006 26.239 2007 27.261 2008 25.722 2009 20.717 2010 23.104 2011 24.313 2012 23.772 2013 22.643 2014 22.356 2015 22.939 2016 22.706 2017 22.865 2018 24.133 2019 23.767 2020 21.993 2021 26.074 2022 28.000 2023 24.708 2024 25.802 2025 25.980 2026 25.981 2027 25.995 2028 26.014 2029 26.015