Please review my IELTS writing task 1

The graph shows the percentage of UK adolescents following a vegetarian diet

The line graph gives information about the proportion of youngsters who choose to follow vegetarianism in the UK from 1960 to 2020

Overall, the graph shows two main periods of adolescents who interested in vegetarianism: the plant-based eating tendency was most popular in the first twenty years, and the downward trend in forty years later

There was an upward trend from 1960 to 1980. In 1960, only a small young people were vegetarians (about 1%). Thereafter, it increased dramatically until reached its highest point at 17%, followed by a steep fall to approximately 6% in 1991

The number of young people eating vegetables tend to decline in the second period. There was a fluctuation until 2000. Over the following ten years, the percentage of young vegetarians rose moderately from nearly 5% to 11%. Then it expected to remain the same in the next nine years.