Writing task 1. Help me check my writing please!!!

The graph below shows average carbon dioxide emissions per person in the UK, Sweden, Italy and Portugal between 1967 and 2007.

The line graph compares the amount of average carbon dioxide emissions per person in four different countries over period of 40 years.

It is clear that the amount of average carbon dioxide production per capital in Portugal and Italy increased over the 40-years period, while this figure for the UK and Sweden fell.

In 1967, the amount of average carbon dioxide generation per person in the UK was about 11 metric tonnes. The figure for Sweden, Italy and Portugal were lower, at about 8.4 metric tonnes, 4.2 metric tonnes and 1 metric tonnes respectively. From 1967 to 1977, there was a significant growth in the figure of both Portugal and Italy, and that of Sweden peaked at 10.5 metric tonnes while it remained in the UK.

After 1977, the amount of carbon dioxide producted by average person in the UK went down slightly to 9 metric tonnes in 2007. The figure for Sweden fell dramatically. Whereas that of Potugal rise sharply, and both of nations reached at the same level (about 5.5 metric tonnes). The amount of average carbon dioxide generation per capital in Italy overtook that of Sweden in 1990 (at 7 metric tonnes) to became the second highest of all.