|Additional albums by performers already included*||279||22.8|
|Individuals (from 923 albums)||1714||100.0|
|Not from North America or Europe||69||4.0|
|No nationality and date of birth||25||1.6|
|No date of birth||49||3.1|
*Where additional albums included new band members such individuals were also included in the final data set.
†Country, blues, jazz, vocal, celtic, folk, bluegrass and spoken word.