That is a huge document! 63 markets worth of ratings.
Summary of news ratings:
Morning: GMAZ leads, though it's 5 and 10 that lead in the 4:30am half hour.
Midday: 5 has a good lead on 12 and 10. 15's 11am newscast pulls in about half the viewership of the other newscasts.
4pm: The early slot is currently led by 3's 4:30 half-hour of GEAZ. 15 (at 4) beats 12's EVB Live however.
5pm: 10 has a 4.6 at 5:00 while 3 is second with a 2.6.
6pm: 12! Arizona Nightly News has a .3 lead over 10. The CBS Evening News beats 15's local news offering, which in turn beats 3.
9pm: 10 is leading 3 by about a 2.5 to 1 margin (3.3 to 1.3).
10pm: The only really close one. 12 has a 4.8 rating, 5 has a 4.7. 15, 10, and 3 (pulling a 0.9!) round out the list.
In short, there is no clear news leader in Phoenix, but 15 doesn't lead in any timeslot. 3's leads are in the morning and early evening, while 5 is competitive especially in midday and at 10. 12 leads at 6 and 10, and 5 and 9 belong to 10.
Just for fun...Dayton, Ohio is the last market on the list. WHIO is pulling a 15.1 (!) rating for their 11pm newscast, which is nothing short of incredible. (They're always a powerhouse though.) Other clear winners nationwide with 10+ ratings for their late news: KOTV Tulsa (12.5 at 10pm), KFOR and KWTV in OKC (12.0 and 11.9 respectively), WKRC (12.5), KUTV (13.3), WTVF (10.0) and KDKA (10.7). All but one of these stations are CBS affiliates, and remarkably two are in the same TV market.