Fig. 1. Pesticide classes and the ratio of suicide completion to suicide attempts (%) in each category, between 2011 and 2014. Combined pesticides*: two active ingredients in a pesticide formulation, or two or three active ingredients in more than two different pesticides. In general, pesticide formulations include various kinds of surfactants as an emulsifier. However, in some instances, the surfactant** is sold separately. For details, please see the "Discussion".