Diseases of the respiratory system w'ere the leading cause of death in 1990 (31.3 per cent), but decreased to 4.5 per cent in 2005 and stayed between 3 .4 and 4.5 per cent in the period 2005-2016. In 2014, the probability of dying between the ages of 30 and 70 years from the four main non-communicable diseases (NCDs) was 32 per cent. The leading causes of mortality in 2016 were diseases of the circulatory system (33.3 per cent), cancer (25.6 per cent), injuries, poisoning and certain other consequences of external causes (15.0 per cent), diseases of the digestive system (7.4 per cent) and diseases of the respiratory system (4.3 percent).