The bar chart shows the percentage of school children learning to play different musical instrument in 2005, 2010 and 2015. (the piano was over 10% in 2005, over 20% in 2010, about 35% in 2015; the guitar was over 10% in 2005, about 18% in 2010, 40% in 2015; the drums was about 5% in 1005, about 4% in 2010, about 10% in 2015; the violin was 10% in 2005, 9% in 2010, 5% in 2015)