Year % of GDP 2008 4.88674020767212 2009 4.81650018692017 2010 4.04593992233276 2011 3.7802300453186 2012 4.40817022323608 2013 4.52833986282349 2014 3.53999996185303 2015 3.41700005531311 2016 3.46906995773315 2017 3.41899991035461 2018 3.29537010192871 2019 3.08500003814697 2020 3.21700000762939 2021 2.94799995422363 2022 2.89800000190735