The line graph illustrates the proportion of several kinds of turtles (leatherback, green, olive ridley, and the remaining species) in India from 1980 to 2012.
Overall, the population of olive ridley turtles increased over time while the opposite happened to the leatherback turtles. Interestingly, the number of green turtles and the remaining species remained stable, with slight fluctuations over the period given.
According to the chart, all species started with the same numbers in 1980. However, the number of olive ridley turtles grew consistently, peaked at nearly 140 in the late 90s, and continued to dominate the population until 2012. Meanwhile, the proportion of leatherback turtles declined. At first, there was a rise to around 110 in 1987, before finally falling to below 100 and dropping to a low of about 60 in the last year, making this species the smallest in numbers compared to the other species.
On the other hand, green turtles experienced slight fluctuations throughout the years. The greatest number was in 1980, nearly 110, after which it fluctuated and landed at a low of nearly 90 in 2012. Likewise, the remaining species of turtles continuously rose and fell over the period given and accounted for the second-largest population.