NOTE: Certain statistical categories include sub-categories. Not all agencies report these sub-categories. For example, the Rescue category includes four different possible causes, but some agencies only report totals. Therefore, in determining the percent of rescues attributable to rip currents, for example, agencies that do not report on this category should be excluded, as should agencies covering small lakes and rivers where rip currents do not occur. Contact firstname.lastname@example.org for further information.