According to the number of accesses to my WWW pages (in May),
the seiyuu rankings are as follows.

                         number  prev months ranking
 1. Inoue Kikuko         2445 [            1,  1,  1]
 2. Hayashibara Megumi   1155 [            2,  2,  2]
 3. Hisakawa Aya          626 [            3,  3,  3]
 4. Mitsuishi Kotono      418 [            5,  6,  4]
 5. Kouda Mariko          417 [           14, 10, 10]
 6. Shiina Hekiru         390 [           16, 14, 19]
 7. Mizutani Yuko         359 [            9, --, --]
 8. Hidaka Noriko         354 [            7,  7,  5]
 9. Amano Yuri            313 [           15, 11,  7]
10. Takano Urara          288 [           10, --, --]
11. Touma Yumi            281 [            7,  5,  8]
12. Yamaguchi Kappei      271 [            4,  4,  6]
13. Suzuki Masami         264 [           17, 20, 22]
14. Hiramatsu Akiko       255 [            6, 12, 15]
15. Minaguchi Yuko        234 [           18, 17, 15]
16. Shiratori Yuri        226 [           12, 19, 25]
17. Araki Kae             219 [           23, 21, 12]
18. Tomizawa Michie       218 [           11,  9, 11]
19. Yokoyama Chisa        214 [           24, 16, 24]
20. Chiba Reiko           200 [           42, --, --]
21. Sakuma Rei            198 [           13,  8,  9]
22. Tsuru Hiromi          181 [           26, 18, 17]
23. Shimamoto Sumi        175 [           18, --, --]
24. Fukami Rica           165 [           25, 26, 13]
25. Takayama Minami       161 [           21, 13, 14]
26. Iwao Junko            154 [           51, --, --]
26. Kasahara Hiroko       154 [           50, --, --]
28. Kamiya Akira          153 [           20, 15, 18]
29. Asami Junko           152 [           31, 24, 25]
30. Orikasa Ai            150 [           22, 23, --]

Of course there is a direct link from my home page, so Inoue Kikuko 
has a slight advantage.. (^_^)
--
Hitoshi Doi, Toshi Nibunnoichi                                  doi@tcp.com
half a UFO catcher doll, half a cel          801 tactical training squadron
http://www.tcp.com/doi/doi.html                             toshi@win.or.jp