I'm doing this under coercion. Based on talking voice, because.
Kaori Iida - 50
Rika Ishikawa - 50
Michiyo Heike - 50 (I must assume everyone forgot what she sounds like.)
Aya Matsuura - 33
Miwa Kominato - 32 (Well, this is partly for the crazy things she can do with her voice.)
Kei Yasuda - 27
Yuuko Nakazawa - 19
Rinne Toda - 9
Asuka Fukuda - 9
Aya Ishiguro - 9
Mai Satoda - 6
Ruru Honda - 6