Overall, fish and chips was eaten more at the start of the period, while it was replaced by hamburgers after 1985. Interestingly, pizza was the least favorite fast food over the whole period.
The consumption of pizza and hamburgers was almost the same (less than 20 times a year) in 1975. Their consumption dramatically increased until the final years. However, the growth of hamburgers were more significant in comparison to pizza and it peaked to 100 times per year by 2000, while pizza reached just over 80 times annually in 1995 and maintained stable to the end of the period.
On the other hand, fish and chips was the most common with the amount of 100 times per year in the first year of the period. Then it's popularity fluctuated and dropped to nearly under 40 times annually in 2000.
