(someone else asked him) "First, how do you define "adult?" Most states issue to 21 and over only. About 10 issue to 18 and over. A few start CCW at 23 or 25. Did you crank that into your percentages?"
(He replied) Census has 21+ and 18+ counts, so those were easy. In my
spreadsheet, I added a column for the age of an "adult" where CCW is
concerned. I was surprised that this altered numbers more than I
anticipated. For example, when I was still using the 21+ Population
in South Dakota, I believe the percent of licensees was 7.99
New Mexico (age 25) and Missouri (age 23) did initially throw me.
But after rechecking the numbers, I noticed Census had population
breakdowns based on age in 5 and 10 year blocks. 20-24, 25-29,
etc. For New Mexico, my "Target" population was the sum of the 25-
29 block and all other blocks up thru the oldest.
For Missouri, I had to take a SWAG. I took the Age 21+ count, and
subtracted 40 percent (2/5ths) of the 20-24 Population count. I
conjectured there's an approximately equal spread of folks in each
Year of Age from 20 to 24. 40 percent of the 20-24 Population
should approximately equal the number of 21 and 22 year olds. Given
that Missouri is so new to the game, this should not skew their
numbers significantly--also I think the number of licensees was an
estimate and not a recorded number the state keeps.