The graph depicts a changes in consumption of Fast Food by Australian Teenagers between 1975 to 2000. On the graph is three curves and each represent different type/kind of food - (Pizza, Fish and Chips and Hamburgers).
At the beginning of this period, that is in 1975 a consumption of Pizza and Hamburgers become rose, but with not the same speed. First (which was mentioned a moment ago by me) more steeply and until 1980, when stood at 85%, whereas the second more slowly. So only an intake Fish and Chips steadily declined from 100% to around 85% in mid-1980. Then was a slight recovery between 1980 to 1985 and after that [a/the - ?] consumption Fish and Chips again significantly decreased to little less than 40% in 2000.
By comparison between 1985 to 1995 in each amount of consumption Fast Food obviously except Fish and Chips was a growth from approximately 25% to a little above 80% for Pizza and from roughly 82% to 100% for Hamburgers, so an intake Hamburgers had definitely the highest growth. Afterwards of both them plateaued to the end of this period.
To sum up only a consumption Fish and Chips from the beginning, when its amount was 100% to the end it kept a downward trend, while two others had significant rise and finally only consumption of Hamburgers reached 100% at the end.
(Starałem się :D)