Year	% of GDP
1972	2.88960003852844
1973	3.32552003860474
1975	2.47420001029968
1976	1.89257001876831
1977	1.76490998268127
1978	1.70678997039795
1995	1.36478996276855
2011	0.850319981575012
2012	1.58642876148224
2013	1.84381175041199
2014	2.01199841499329
2015	2.2456042766571
2016	2.15808844566345
2017	2.32633996009827
2018	2.15748000144958
2019	2.13986992835999