Year % of GDP 1991 22.467151155796277 1992 22.353859975775414 1993 22.358899851335767 1998 24.17462313055426 1999 24.558010781984535 2005 22.07314205851948 2006 22.554226937674645 2007 23.910927905663716 2008 22.70466128224445 2009 21.46075788460736 2010 22.30423884100449 2011 22.28255826872577 2012 22.60725514300106 2013 23.168942122223022 2014 23.78917562375625 2015 23.61734658846423 2016 23.402321430995833 2017 23.66293527893395 2018 23.56880775651534 2019 23.830106677819064 2020 23.358838031946828 2021 24.03361866511436 2022 24.682301284077454