Though these numbers aren't exactly apples-to-apples compared to last year due to Tonight Show being a repeat on Friday due to Conan O'Brien's head injury. It could be his head was already hurting a bit even before the fall.
The Tonight Show delivered a 1.7/5 in households with 2.40m average viewers, down 48% in households (from 3.3/8) and down 49% in viewers (from 4.73m) from last year's premiere week,
It was also down 31% in adults 25-54 (1.1/5 from 1.6/7), 23% in adults 18-49 (1.0/4 from 1.3/5) and 20% in adults 18-34 (0.8/4 from 1.0/4) compared to premiere week last year when Jay Leno was still hosting the show.
The Tonight Show posted its lowest rated week in households and viewers since the premiere of Late Show with David Letterman and matched its all-time lowest rated weeks in both adults 25-54 and adults 18-49.