Year	% of GDP
1990	20.185138347918457
1995	17.901477480055807
1996	18.57191780821918
1997	18.091501613617666
1998	17.73552187042186
1999	17.1248518486399
2009	16.496198049227754
2010	16.194535048310666
2011	16.442348160510846
2012	17.3819159040388
2013	18.229817831836186
2014	18.337570094704546
2015	16.9067087638249
2016	16.8001853447767
2017	17.129171979892295
2018	17.837270495772636
2019	17.59466055374593
2020	14.040255792011742
2021	15.877161706545667