1% 2%

The 1% is a common reference to multi-billionaires who presumably got an education and then shifted their arses out of bed every morning thinking, "What can I do to make a buck today?" and went out and did so.

The 2% is altogether different and it applies to two groups of people and has nothing to do with wealth acquired or inherited. 

"Mensa" a rather exclusive international group is by and for the 2% of us who have genius IQs. 
"Densa" is for the 2% who, to put it gently, don't have genius IQs. (aside) "How're we doin'?"

Originally, according to Wikipedia.com, the "Densa group" was a jokey article in the Mensa periodical "Boston & Outskirts Mensa Bulletin (BOMB)."  The treatise about Densas was printed in 1974.

Recently (day before yesterday) mention of Densa was made in the Readers' Digest and urged readers to Google "Densa" and take their IQ test to see where we rank.  Highs and lows ranged from "Smart enough" to "an IQ lower than a loaf of bead." 

The questions are sneaky.  So as not to be a spoiler, here is only one example.

"Is there a 4th of July in England?"  Ans.  Yes, of course!  There's a July 5th, 6th, etc. too.