A look ahead suggests that reductions in deaths
from heart conditions and cerebrovascular disease
are likely to drive spending on mental disorders
even higher, as more people survive to older
ageswhen mental disorders, such as dementia, become more prevalent.
(So I'm guessing it's dementia included
in 'mental disorders' institutionalized which
explains why that seems so high.)
http://content.healthaffairs.org/content/early/2016/05/13/hlthaff.2015.1659.full
"People Who experience mood swings, fear, voices and visions"