Year Percent of GDP (Units) 1990 27.473 1991 22.375 1992 22.250 1993 23.447 1994 23.072 1995 22.050 1996 21.499 1997 20.827 1998 21.339 1999 20.957 2000 20.829 2001 21.113 2002 21.577 2003 20.829 2004 20.920 2005 20.450 2006 20.518 2007 20.853 2008 23.051 2009 22.051 2010 23.542 2011 24.694 2012 23.451 2013 23.750 2014 24.572 2015 22.496 2016 21.344 2017 23.117 2018 24.419 2019 25.929 2020 25.448 2021 25.675 2022 28.516 2023 27.492 2024 27.573 2025 27.358 2026 26.855 2027 26.801 2028 26.782 2029 27.063