The given line graph illustrates data on the number of international conferences in three cities.
Overall, it can be seen that there was a considerable upward trend in the figure for City C, while City A and City B saw a substantial fall.
Looking at the details, City B went down between 1965 and 1975, whereas City A experienced a sharp decrease. Then, there was a slight increase for City B in 1985, when this year became the sharpest increase for City A. Both cities dropped between 1985 and 2005. Then City A declined from 30 to 20 conferences and city B fell down from approximately 30 to 25 conferences.
By contrast, the figures for City C followed different patterns. Starting with 0 conferences City C grew continuously between 1965 and 1995. Then it went down in 2005. After, the number of conferences of City C increased from 25 to 30 in 2010.
