6 more on CD-ROM 24.8 21.2 19.2 3268 2111 26.0 23.1 20.1 3163 2248 27.2 24.7 22.2 3516 1926 26.4 24.1 21.3 3493 2045 24.6 21.5 19.5 3571 1982 25.5 22.7 20.0 3407 1971 24.5 21.0 19.2 3494 2060 19.8 17.8 16.1 3481 2004 26.7 23.9 20.7 3996 1903 9 sites, 12 more on CD-ROM 18....