The below bar graph shows most common speaking topics that used between 2015 and 2017. The y-axis shows the propotion they were used, while the x-asix illustrates topics. Finally, starting from left, each bar represents a year: 2017, 2016, and 2015, accordingly.
Overall, topic about events was most common used in each years, but the topics about media, society, and other showed lowest percentage of use, while topics about people, places, and objects remain stable in given period.
It is clear from the bar chart that the most popular topic about events was the highest in each year about relativey near to 50 percent. While topics about media, society, and others were show the lowest propotion, media showed little increase only for 3 percent and peaked at eight percent in 2017. Society and Others remain stable about 4 and 5 percent.
Similarly, topic about people showed littile flactuation peaked at 16 percent in 2016. Topic about place also showed ossilation peaked at 14 percent in 2016. But topic about objects was showed decrese through the period it was about 11 percent in 2017.
In conclusion, all charts remained stable.