But (on the contrary)

Writing task 1 (Line graph)
The line graph compares the number (sum) of fast food types which were consumed by Australian teenagers between 1975 and 2000.
It is clear that the proportion of consumption of fast food like pizza and hamburgers that were eaten by teenagers had definitely increased but (on the contrary) fish and chips went definitely down at the end over the period shown. Overall, the much larger amount was consumption of fish and chips in the beginning in comparison with others.
In 1975, the amount of teenagers who were eaten was almost 100 times per year. The figures for pizza and Hamburger were lower for about 10 times than fish and chips. By 1985, it actually started decreasing from 95 times to 39.
At that time by 1975 the number of pizza and hamburger that were consumed per year started to experience the fastest growth. Pizza reached around the top number like 100, compared to about 83 hamburgers per year and only 39 of fish and chips in 2000.