Year % of GDP 1990 50.7881769906485 1991 49.65028385032776 1992 51.16885195304016 1993 50.05007288965959 1994 37.90687912126353 1995 40.90451571578899 1996 44.83986869294876 2006 46.54264720286989 2007 43.097077811703436 2008 40.57581730773943 2009 40.26391923435718 2010 36.701452380930554 2011 36.62737125068815 2012 38.66390859679448 2013 40.508527834278816 2014 39.9417118719375 2015 35.32039000301889 2016 34.77393997432559 2017 33.580848391334044 2018 30.707830649700636 2019 30.128974335912613 2020 28.76564534234536 2021 32.86424871090486 2022 29.45606666781902