Year	constant 2011 international $
2006	1491.32444550765
2007	1569.64644555072
2008	1564.07787334237
2009	1511.26134226466
2010	1558.59080176213
2011	1603.53511898984
2012	1675.80098933061
2013	1714.41468275322
2014	1775.3487761381
2015	1804.95210172744
2016	1971.00882755911
2017	2200.53774860428
2018	2211.00210686864