TV Ratings: 'Big Brother 13' leads rerun-heavy summer Sunday

Fast National ratings for Sunday, July 10, 2011"Big Brother 13" continues to rule Summer Sundays for CBS, easily knocking out the competition's reruns. Meanwhile, "The Marriage Ref" on NBC had a boost in viewership this week, though it remained in last place for its timeslot.CBS had an average of 6.3 million viewers with a 4.0 rating/7 share in households, easily beating ABC's 4/1 million viewers with a 2.6/5 share. NBC followed (3.9 million, 2.5/4) and FOX rounded out the bunch (2.9 million, 1.6/3).The adult demo was led by CBS with a 1.5 rating, followed by FOX with 1.3, and ABC and NBC, which tied with 0.9. Sunday hour by hour: 7 p.m. CBS: "60 Minutes" (8.4 million viewers, 5.5/11 households) ABC: "America's Funniest Home Videos" rerun (4.9 million, 2.8/5) NBC: "Dateline" (3.6 million, 2.4/6) FOX: "American Dad" rerun (1.7 million, 1.1/2)/"Bob's Burgers" rerun (1.7 million, 1.0/2) 18-49 leader: "America's Funniest Home Videos" and "60 Minutes"...