Even though the numbers certainly don’t seem extraordinary if you put them in context. It would be a interesting social science research project to figure out how to get comparable data and which comparisons are useful.
Obviously that's something that's really hard to adjust for, living at your place of work, but the best start would be to identify if all the people who committed suicide at the plant, also lived at the plant
(I may be grossly incorrect here; I'm about to doze off, and my memory sucks most of the time anyway. If I'm wrong, my apologies.)
If so, perhaps a fair basis of comparison would be the suicide rate at other manufacturing plants, along with the general suicide rate for working employees.
I imagine anyone with work and employment is less likely to commit suicide than the general population (though I haven't seen the statistics). The question is, is working at FoxConn more stressful than other comparable employers?