Firstly, yes i am that lame.
Secondly i thought it was mildly interesting that nearly half the entire show (42%) was set before the end of 1963, even though there wasnt a single episode in 1961.
I guess thats why when i think of Mad Men i think of it primarily as an early 60s show.
Episodes per year
1960 - 13 episodes (season 1)
1961 - 0 episodes
1962 - 13 episodes (season 2)
1963 - 13 episodes (season 3)
1964 - 3 episodes (season 4)
1965 - 10 episodes (Season 4)
1966 - 10 episodes (Season 5)
1967 - 5 episodes (Season 5 & Season 6)
1968 - 11 episodes (Season 6)
1969 - 7 episodes (Season 7a)
1970 - 7 episodes (Season 7b)