The line graph illustrates the number of international conferences in three cities from 1965 to 2010.
Overall, the number of international conferences in City A and City B showed downward trends throughout the period, albeit at varying rates. Notably, despite exhibiting the smallest number initially, the number of international conferences in City C increased dramatically, overtaking both City A and City B for the better part of the period.
In 1965, the number of global summits in City A was the highest, 35; however, in 1975, the figure saw a steep decline, falling to 20. Despite a decrease, the number of international conferences in City A recovered to 30 in 1985, before remaining unchanged until 2005. However, from 2005 onwards, the number of global summits in City A decreased significantly to 20. Similarly, City B had the second-highest number of international conferences in the first year, with over 30; it was followed by a gradual reduction, ultimately dipping to 25 in 2010.
In contrast, the figure for City C bucked the trend. In 1965, City C had the lowest number of global summits, estimated to be 0; however, in 1995, the figure experienced a dramatic increase to a staggering 27, overtaking City A and City B. In the following years, the number of international conferences in City C increased slightly to 30 in 2010, despite seeing a minimal dip in 2005.