Nurses treat 80% of the population who visit dispensaries, health centres and private clinics in rural and under-served urban areas. Complicated cases are referred to clinical officers, medical officers and medical practitioners. According to the Kenya National Bureau of Statistics, in 2011 there were 65,000 qualified nurses registered in the country; 8,600 clinical officers and 7,000 doctors for the population of 43 million people (These figures from official registers include those who have died or left the profession hence the actual number of these workers may be lower).