This is because patients prefer performance test in medical services, then consider this service is repeated so many times in the medical staff per year or more in the population criteria.
This is because patients who underwent testing. Effective in providing treatment. Then consider a repeat. So many times in the medical services of the population per year, so in the least.
This is because the patients want to test. The service efficiency in health care. Then consider to the sum. So a number of times in the use of medical services per year of the population has remained low.