Social media, and smart phones are partially (or even largely responsible) ... However I wouldn't discount 'social contagion' as a contributing factor since 201

Social media, and smart phones are partially (or even largely responsible) ... However I wouldn't discount 'social contagion' as a contributing factor since 2012 was around the time focus on "mental health" (specifically focusing on 'mental health' and related issues) came into wide prominence, especially amongst the younger crowd.