The line graph illustrates how many international conferences took place in three cities between 1965 and 2010.
Overall, it is evident that the figures for Cities A and B fluctuated considerably throughout the period, while City C experienced a steady and remarkable upward trend. In addition, although City A initially hosted the highest number of conferences, it was eventually overtaken by City C towards the end of the timeframe.
Regarding Cities A and B, both saw noticeable variations. City A began with around 35 conferences in 1965, dropped significantly to roughly 20 in 1975, and then recovered to nearly 30 by 1985. After reaching a peak of about 32 in 2000, it fell again to just over 20 in 2010. City B followed a similar fluctuating pattern but remained more stable overall, moving between 25 and 30 conferences for most of the period before declining slightly to around 25 at the end.
In contrast, City C showed a continuous rise. Starting from zero in 1965, its number of conferences climbed sharply to approximately 20 in 1985 and continued increasing to reach around 27-28 by 2000. By 2010, the figure had risen further to almost 30, surpassing both Cities A and B and becoming the leading host city by the end of the period.