Table 1

Sample selection: exclusions and inclusions

	N	%
Albums	1210	100.0
Excluded
Compilation albums	2	0.2
Soundtracks	9	0.7
Additional albums by performers already included*	279	22.8
Included	923	76.3
Individuals (from 923 albums)	1714	100.0
Excluded
Excluded genre†	81	4.7
Not from North America or Europe	69	4.0
Included	1564	91.3
Missing data
No nationality and date of birth	25	1.6
No nationality	1	0.1
No date of birth	49	3.1
Included	1489	95.2

*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.