The line graph presents the trends on monthly junk food consumption of Australian teenagers on three different fast-food types over the period of 1990-2020.
Overall, it is clear that the popularity of French fries was far over those of hamburger and pizza in initial years. The figures of hamburgers and pizza followed similar patterns, growing over the years. The tendency for pizza saw a small period of stability before ranking a second at just below hamburgers, while that of French fries plunged, reaching a bottom of chart.
At the beginning of period, the figure for hamburger started a period at just above pizza with 10 times per month, while French Fires had a difference of many folds at 70 times. In following years, the rates of Hamburger and Pizza consumption nearly aligned together, rising steadily. By contrast, Friench Fries showed a period of decline, being over outnumbered on a point of about 45 times per month in 2005.
However, Pizza had overshadowed Friench Fires in popularity after 2005, while consumption of French Fries kept declining. After 2010, the rate of pizza consuming remained relatively unchanged at 70 times, whereas hamburger showed a steady growth. In 2015, Pizza started to rise under hamburgers, reaching 90 and 80 times respectively; however, that of Friench Fries further declined, hitting trough at around 8 times in 2020.