In reply to Divab.

Usually there isn't a definite number it changes according to the votes of the Rock and Roll members and the general public (it's from 5 to 8 inductees yearly)...

The voting its also weird, the top five artists, as selected by the public, will comprise a “fans’ ballot” that will be tallied along with the other ballots to choose the 2021 inductees.

At this time here's the votes updated...

Tina Turner 13955 Votes

Foo Fighters 10793 Votes

Carole King 9787 Votes

Iron Maiden 9018 Votes

The Go-Go's 8496 Votes

Rage Against the Machine 6798 Votes

Todd Rundgren 6382 Votes

Devo 6097 Votes

Dionne Warwick 5785 Votes

Chaka Khan 4989 Votes

New York Dolls 4090 Votes

Kate Bush 3671 Votes

LL Cool J 3329 Votes

Mary J. Blige 3090 Votes

JAY-Z 3042 Votes

Fela Kuti 1390 Votes