Response Category Relative Frequency (expressed as percent) Prohibited completely 54% Permitted for business purposes only 19% Permitted for limited personal use 16% Permitted for any type of personal use 10% Don't know/no answer 1% (a) Explain how the survey response categories and corresponding relative frequencies were used or modified to produce the accompanying graphical display. The categories "Permitted for business purposes only" and "Permitted for limited personal use" were combined into the category "No but some limits apply". The categories "Permitted for business purposes only" and "Permitted for limited personal use" were combined into the category "Yes".     The categories "Prohibited completely" and "Permitted for any type of personal use" were combined into the category "No but some limits apply". The categories "Don't know/no answer" and "Permitted for business purposes only" were combined into the category "No". The categories "Prohibited completely" and "Permitted for any type of personal use" were combined into the category "Yes".