I think there is a mistake in your post.
If you see a number or statement that doesn’t seem to make sense, it is very possible it is a mistake on my part. Let me know and I will fix it as soon as possible!
Why don’t the %s not add up to a 100%? Why don’t the individual cells in the table add up to the total?
If the discrepancy is small, it is most likely due to rounding.
Why do you have 0 (%) for some cells? Does this mean there really isn’t anyone who has that attribute/participate in that activity/etc.?
There are a number of possibilities for zeroes or 0%s:
1) I made a mistake copying the data from another source (please let me know if you think this is what happened!)
2) The source made a mistake (very unlikely in most cases)
3) The 0 is due to rounding
4) It really is a 0. Sometimes these this can do with how the survey/administrative source is designed (i.e. it doesn’t cover certain groups of people). Sometimes this can be because there really just aren’t any people with that attribute, etc.