The given line graph illustrates a comparison of international conferences that organized in three different cities.
Overall, what stands out from the graph is that there were the same notable downward trends in city A and city B, while there was a considerable upward trend in city C.
According to the graph, the number of international conferences in cities A and B witnessed a fall. In 1965 in city A, the figure in the beginning was 35, after which it dropped sharply to 20 and surged 30 conferences at the same time, having reached almost the same rate as the city of B. Finally the city A reached the lowest point, dropping to 20 conferences in 2010. During the period from 1965 to 2010, city B showed fluctuations. In 1965, 30 conferences were held and in 2010 there were 25 conferences, showing not a very big change.
On the contrary, in city C it started with zero conferences gradually rising to about 30 conferences in 1995. By 2005, this figure had dropped back to less than 25, and in 2010 it increased by 5.