Year	% of GDP
1997	13.975244334738218
1998	11.183123627769234
1999	8.565224051718848
2000	11.325659401878902
2001	11.443403331939434
2002	13.234335757069534
2003	13.936406511110327
2004	15.144587237126755
2010	21.411551995305224
2011	24.003066520896127
2012	22.524027232020426
2013	20.532316125474466
2014	19.45438737971908
2015	13.666436740263125
2016	13.74785600184454
2017	16.167301606540914
2018	16.003683087852792
2019	14.938516677463923
2020	11.842155993519103
2021	12.338182349020226