Season ratings averages:
S1: 1.73m
S2: 1.69m
S3a: 1.90m
S3b: 2.05m
S4: 1.61m
S5a: 1.17m
S5b: 916K
S6a: 472K
Note:
Seasons 1, 2 and 4 were stand alone seasons, meaning each season was a different story arc. Season 5 was green lit for 20 episodes, but this time, all will be the same story arc. Only season 3 was split with 2 different story arcs, each with 12 episodes. Season 6 was split with 10 episodes for each story arc. The shows pilot episode aired 5 June 2011.
For those wishing to see Season 6A, it's still available online here:
MTV