The line graph below shows the percentage of tourists to Scotland who visited 4 different attractions in Edinburgh

The given graph indicates the proportion of people who traveled to 4 distinguishing destinations in Edinburgh, Scotland from 1980 to 2010.
As can be seen from the graph, during 30 years, the castle had always been the favorite attraction but the least attractive one had changed from the zoo in 1980 to the aquarium in 2010.
It is clear that there was a rapid increase in visitors to the castle from 25% in 1980 to 45% in 1995 then the percentage slightly went down to 30% in 2010. The trend for the aquarium was similar to the castle. Visitors climbed from 20% to 35% between 1980 and 1985 then gradually declined to less than 10% over the next 25 years.
The number of tourists who visited the festival fluctuated slightly but in general remained stable at about 25%. Visitors to the zoo also fluctuated over the first 20 years then rose sharply from 10% to 20% between 2000 to 2010.