Looking for generational gaps in music

<img width=“750” height=“456” src=“https://i0.wp.com/flowingdata.com/wp-content/uploads/2020/04/Music-gaps-1.png?fit=750%2C456&ssl=1" class=“attachment-medium size-medium wp-post-image” alt=“” srcset=“https://i0.wp.com/flowingdata.com/wp-content/uploads/2020/04/Music-gaps-1.png?w=1342&ssl=1 1342w, https://i0.wp.com/flowingdata.com/wp-content/uploads/2020/04/Music-gaps-1.png?resize=750%2C456&ssl=1 750w, https://i0.wp.com/flowingdata.com/wp-content/uploads/2020/04/Music-gaps-1.png?resize=1090%2C66 …