Please help me correct my IELTS WRITING cam 14 - test 3 - task 1

The bar chart gives information on the earnings from exported products in the country during a year from 2015 to 2016 and the table reveals alteration in values in the same period of time. There are five categories of exports namely petroleum products, agricultural products, engineered goods, gems - jewellery and textile.

In general, there was an enormous amount of exported goods regarding petroleum and engineering which contributed for over 60 billion each. Whereas engineered goods witnessed a sharp increase by 8.5% in 2016, almost three times as high as petroleum products that were the greatest source exported in 2015. In addition, gems and jewellery were the third popular products exported in the country, despite a slight decline by 5.18% in 2016. While there was an insignificant rise in agricultural products between 2015-2016, textiles soared to 32 billion, which was calculated 15.24% higher than that in 2015 and accounted for the biggest growth among other exports.