Why was the chart data changed from the original source (EIA)? For example, Q2 2011 balance is half of what EIA shows, Q4 2011 balance is twice what EIA shows, Q2 2013 balance is positive whereas EIA shows it as negative, and Q1 2014 balance is about 10x larger (positive) than EIA shows it to be. This last error affects where one interprets the surplus started; in the original EIA data it started in Q2 2014, and jumped significantly in Q4 2014, whereas the article inexplicably says it started with Q3 2014. Also, 9 points in the consumption graph differ from the EIA original, but the differences are slight compared to the balance graph. The article also misleads where it states "EIA forecasts a balanced oil market later in 2017"; EIA actually forecasts 3 quarters of surplus and 1 quarter (Q3) of balance in 2017. This contradicts the conclusion that the current supply glut will stop growing; in fact it will continue to grow, but grow more slowly than in 2015 and about the same as in 2016