Estimating the True Global Burden of Mental Illness
Read the entire article. (34 minutes)
Although the data is old, it offers one of the more recent publicly assessable comprehensive overviews, and evidence shows that the data have been relatively stable over time.
The Lancet - 2016
Click https://www.mhinnovation.net/sites/default/files/downloads/resource/Vigo%2C%20Thornicroft%2C%20%26%20Atun%20Full.pdf link to open resource.