The below bar graph represents the most popular speaking topics used in 2015 to 2017. The y-axis shows the percentage they were used, while the the x-axis represents the topics. Finally, starting from left, each bar represents a year: 2017, 2016, and 2015, accordingly.

The graph below shows the most popular speaking topics used from 2015 to 2017. The yellow axis shows the percentage of 2016, the green axis shows the data in 2015, and the blue axis shows the percentage for 2017. Overall, events consistently changed the most across all three years, while society and other topics remained […]