The bar chart illustrates differen types of music(Pop, Classical, Jazz and Rock) that have been bought in the United States in twentyones century by age group.
In young age of society, Pop music was popular and it became the most popular in young age of society cuz it was in the top of the chart and almost overcome the roof of the chart, but after in elder than young age of society popularity of Pop was not so big and it fell down, in two variences of middle age society his popularity was so low that it was in the button of chart it had dramatic fell if compare young age and midlle age, but in the age of old society it had grown a bit and got the third place. If we look the Rock music it had the second place in the young age group but in the elder age and two different midlle ages it was pretty popular and had the first place, but in the old age it was not so popular and again got his second place
If we look at the Jazz and Classical musics they were in the last places in the all types of ages and had overcomed only each other on different ages, in the young ages of society it was not popular in the most but Jazz was a little bit of more popular than Classical, in the age of elder than young age group there is no diferences between these two but in those age it was more popular, the same with the young midlle age, but in the older midlle age Classical music was more popular, in the old age they both had almost similar places
In conclusion, These types of music had interesting information between the different ages and th most interesting had Rock with his popularity in young ages and midlle ages.