Add denominator to LBT14

[mhallal1]

After discussion with @BFalquet, I am creating this issue to ask for the option to be able to add the denominators of the population to the table LBT14.

[clarkliming]

do you mean total N in the header? it is already included.

Maybe you can add some details to this question

[BFalquet]

They would like to have 71 / 121 instaead of 72 (53.7%)

[mhallal1]

They would like to have 71 / 121 instaead of 72 (53.7%)

exactly, thanks @BFalquet.

[oreillb1]

@mhallal1 @BFalquet I believe this will help output reviewers to understand the reported data.

[clarkliming]

@BFalquet as lbt14 use the same analysis across the template, we can consider the following:

1. expose the arguments like stats, formats, etc in the main function
2. expose only the required arguments
3. do not expose these arguments, but use ... to tell the user that this handles extra arguments for that occurrence

anyway this is non-standard so have to keep the original functionality