Year Percent of GDP (Units) 1990 19.383 1991 20.776 1992 21.645 1993 24.531 1994 19.029 1995 17.213 1996 18.666 1997 19.393 1998 19.419 1999 23.321 2000 22.099 2001 25.066 2002 26.809 2003 26.441 2004 25.544 2005 23.610 2006 24.394 2007 24.449 2008 26.409 2009 28.352 2010 26.463 2011 25.912 2012 26.356 2013 29.576 2014 27.638 2015 26.022 2016 27.383 2017 26.858 2018 26.156 2019 25.724 2020 27.845 2021 28.424 2022 23.820 2023 25.955 2024 27.020 2025 27.214 2026 27.117 2027 26.822 2028 26.838 2029 26.870