Year	% of GDP
1977	2.15020990371704
1978	2.23247003555298
1979	2.44127988815308
1980	2.66633009910583
1981	4.39297008514404
1987	3.50577998161316
1988	3.33534002304077
1989	3.7466299533844
1999	3.85813999176025
2000	3.43430995941162
2001	4.82515001296997
2007	3.98514008522034
2008	3.50219011306763
2010	4.6313099861145
2011	4.38350009918213
2012	4.42103004455566
2013	4.74213981628418
2014	4.19639015197754
2015	3.64708995819092
2016	3.43478989601135
2017	3.12472009658813
2018	3.07375001907349
2019	3.23900008201599
2020	3.33400011062622
2021	5.59065008163452
2022	4.75224018096924
2023	4.14499998092651