to know it is a bullcrap index. 1986: Ada as #2. Really? Lisp as #3? Really? The world was COBOL and C back then with FORTRAN (caps then) and assembly thrown in. Was there hype around both Ada and Lisp? Yes, very much so. There wasn't even an official standard until the early 80s but Ada and Lisp were going to be "the future." Perhaps more believable is the 1991 #3 as that is when DOD briefly mandated Ada use.
To call either Ada or Lisp "popular" at any time is really a reach. Hype/astroturfing is not popularity. Even tracking "how to I learn ..." searches does not measure popularity. They are measures of interest. Popularity can only be based upon job requirements, number of projects, even (broadly) loc metrics. Popularity is reflected by use/consumption, not what is talked about.
popular: 1. liked, admired, or enjoyed by many people or by a particular person or group. 2. (of cultural activities or products) intended for or suited to the taste, understanding, or means of the general public rather than specialists or intellectuals.
Of def 2, substitute "general programmer" (ie, Java, C, C++) with 'specialists/intellectuals' being those involved with Haskell, D, etc.