The American Pineapple Association divides potential consumers into several segments. One of these, "Cocktail Juicers," only use pineapple juice as an ingredient in beverages, so they are light users. The association believes that, out of $126$ million potential customers in the United States, only $5\%$ fall into the "Cocktail Juicer" segment. This group accounted for $$28\mathrm{.}1$ million in pineapple sales last year, out of total U$.$S$.$ sales of $$723\mathrm{.}6$ million. Calculate Category Development Index for the Cocktail Juicer segment. Report your answer as a percent. Round to the nearest tenth of a percent. Report $25\mathrm{.}5\%,$ for example, as $"25\mathrm{.}5".$