The line graph illustrates the number of international conferences held in three cities from 1963 to 2010.
Overall, while cities A and B experienced declines in conference numbers over time, city C saw a substantial increase, ultimately becoming the leading city for hosting meetings. City A, initially the top city, ended up with the lowest number of conferences by 2010.
In greater detail, city A began with around 35 conferences in 1963, nearly 10 more than city B, which held just under 30. However, city A saw a rapid decline, reaching a low of 20 by 1975. After fluctuating for four decades, the conference count for city A fell sharply and ended close to its 1975 level, making it the city with the fewest conferences by 2010. City B similarly experienced a gradual decrease, ending the period at 25, which allowed it to maintain the second position.
City C, on the other hand, hosted no conferences in 1965, but saw a consistent increase, reaching 30 by 2010. This growth enabled city C to surpass both city A and city B and become the leading city for hosting international meetings by the end of the period.