Setting Oridinals for Data

[MDS]

Can anyone advise me on the use of HIGH/MEDIUM/LOW/NON-USER ordinals against a numeric data set (sales marketshare percentages ranging from 0-78%)? How do you decide to set the boundaries for the various categories/ranges?

[quark]

Welcome MDS. You can try plotting the data to see if there is any "natural" cutoff points.