The given bar graph illustrates the proportions of students who learn to play 4 different types of musical instruments in 2005, 2010, 2015. Overall, the percentage of school children learning to play piano, guitar noticeably increased throughout the period, which means the choice of learning to play piano and guitar are more preferred by most of the children, in contrast, drums and violin are the least preferred options.
On one hand, the percentage of pupils learning to play piano significantly increased in each year, starting off with about 11% in 2005 then almost rose up twice as much in 2010, around 21% and reached its peak of approximately 38% five years later. For the proportions of school child learning to play guitar, in 2005 and 2010, the figure is almost the same with piano, only about 1% to 2% less, and finally 2% higher in 2015, being the most favorable musical instrument in 2015.
On the other hand, the reports for drums and violin are pretty much the same in the first two years surveyed with drums only account for approximately 5% and violin dropped by 2% in 2010 compared to 2005 which is 10%. However, the role reversed in the last year with around 8% for drums and only about 5% for violin.