According to this article in the NZ Herald, coroners only rule suicide when it’s very clear the person intended to take ‘their’ own life. Otherwise, deaths are classified in a different category such as ‘accident’, or the cause will go down as undetermined, an ‘open verdict’.
Of course, the Herald’s article failed completely to mention the gender aspect of suicides or what three times the rate would mean for already huge male suicide rates. This is the same newspaper that recently published a series of articles on domestic violence as if such violence almost exclusively happens to women by men (when in fact non-partner domestic violence happens much more to men and when all domestic violence is included men suffer about 45% of it and women 55%). So when it comes to domestic violence that marginally affects women more than men, the Herald specifically quotes female victim statistics and treats the issue as mainly a problem affecting women, whereas for suicide that overwhelmingly affects men, no mention of gender is considered important. Typical feminist sexism and duplicity.