10% of 1,000 cases of schizophrenia were newly diagnosed in 2012
Explanation:
For every 100,000 people,
The incidence rate of schizophrenia = 5
There are 2,000,000 persons
2,000,000 / 100,000 = 20 * 5 = 100
So, there are 100 new cases of schizophrenia in the entire population
100 new cases / 1000 existing cases = .1 / 100
= 10%
Hence, 10% of 1,000 cases of schizophrenia were newly diagnosed in 2012.
