'Big Three' Arbitron.

AQH 12+ Share for the 'Big Three' markets (Mon-Sun 6am-Midnight).

New York (15,344,600).
WRKS-FM Urban AC 4.9
WHTZ-FM CHR 4.8
WLTW-FM AC 4.4

Los Angeles (10,902,400).
KLVE-FM Spanish Contemp 5.6
KIIS-FM CHR 4.9
KSCA-FM Mexican Regional 4.4

Chicago (7,788,400).
WGN-AM NewsTalk 6.3
WGCI-FM Urban Contemp 6.0
WVAZ-FM Urban AC 4.3

Full details on the radioinfo website: http://www.radio-info.com