http://www.nationalreview.com/node/436484/print
The federal government collects accurate data on the number of pigs in Iowa, on milk cows in New York, and on turkeys in Delaware but none whatsoever on the number of people with schizophrenia. The Centers for Disease Control and Prevention keeps a long list of diseases that must be reported, including cryptosporidiosis, chlamydia, and cancer, but not schizophrenia.
This is remarkable, since schizophrenia is among our most consequential and expensive diseases. In a 2013 study, the annual economic burden of schizophrenia was estimated to be $156 billion. Three studies have reported that individuals with schizophrenia are responsible for 10 percent of all homicides in the United States; other studies suggest that people with schizophrenia — such as Jared Loughner in Tuscon, Aaron Alexis at the Washington Navy Yard, and James Holmes in Aurora, Colo. — are also responsible for up to one-third of mass killings. Even Adam Lanza in Newtown, Conn., had had a diagnosis of schizophrenia, in addition to autism spectrum disorder.
Other developed nations believe that it is important to ascertain the prevalence of schizophrenia and whether it is increasing or decreasing. For example, recent European studies have reported that schizophrenia is twice as common in England and the Netherlands as in Italy or Spain, that it has been steadily increasing in south London over three decades, and that early-onset schizophrenia is increasing in Denmark.
And what do we know about the United States? Nothing. Could an increasing incidence of schizophrenia be partly responsible for the sharp increase in the number of homeless who are mentally ill? We have no idea. Or the increase in mentally ill persons in jails and prisons? Or the startling increase in the number of mentally ill individuals who now receive psychiatric disability benefits, and are therefore eligible for Medicaid, under the Social Security Disability Insurance (SSDI) and Supplemental Security Income (SSI) programs? We know nothing. Our last prevalence study of schizophrenia was in 1980–84, when four cities and one rural area were studied and, from the results, a national prevalence was estimated. The last complete enumeration of “insane” persons in the United States was in the 1880 census.