Reports :: Preventing Fields From Being Displayed?

im working on a report at the moment that will generate a standard NIP (nutritional information panel, similar to whats on the back of pretty much all packaged food products, see link below for an example)

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this in itself is pretty easy, however depending on which market we're selling to, different countries have different requirements for which data is to be shown, ie some markets might require we show how much sodium but not how much fiber, others might require us to show how much carbs and sugars but not how much vitamin C and so on (all up there are 16 different variables for nutritional info, due to size requirements on our packaging we cant simply display all 16 all the time)

at the moment im designing a form which has a drop down box (for the user to select a product) and checkboxes for each of the 16 variables (kilojules, carbs, iron, trans fats, sat fats, etc) following this ive got a report that has all 16 variables on it

i can make the variables that arent ticked on the form invisible (by adding a bunch of IF or Case statements, on print of the report, that determine whether the corresponding checkbox for each variable has been ticked and setting the "visible" attribute to true or false accordingly), however when they are invisible there is still a blank space where the field is meant to be ive got all the fields grouped together, is there any way of making fields invisible and then pushing all the visible fields together so there are no blank spaces?