Year Percent of GDP (Units) 1989 17.966 1990 14.879 1991 14.149 1992 15.690 1993 15.813 1994 16.391 1995 17.581 1996 18.003 1997 17.989 1998 17.388 1999 12.690 2000 11.949 2001 12.178 2002 11.954 2003 12.614 2004 12.655 2005 12.615 2006 12.859 2007 16.031 2008 14.509 2009 14.756 2010 13.800 2011 13.746 2012 14.020 2013 13.529 2014 12.574 2015 12.600 2016 11.139 2017 13.581 2018 13.591 2019 14.062 2020 14.389 2021 14.146 2022 14.309 2023 14.872 2024 15.214 2025 15.731 2026 16.010 2027 16.510 2028 16.910 2029 17.310