By 2015, 97% of the population had access to improved water sources. In 2016, Vietnam's national life expectancy stood at 80.9 years for women and 71.5 for men, and the infant mortality rate was 17 per 1,000 live births. Despite these improvements, malnutrition is still common in rural provinces. Since the partition, North Vietnam has established a public health system that has reached down to the hamlet level. After the national reunification in 1975, a nationwide health service was established. In the late 1980s, the quality of healthcare declined to some degree as a result of budgetary constraints, a shift of responsibility to the provinces and the introduction of charges. Inadequate funding has also contributed to a shortage of nurses, midwives and hospital beds; in 2000, Vietnam had only 24.7 hospital beds per 10,000 people before declining to 23.7 in 2005 as stated in the annual report of Vietnamese Health Ministry. The controversial use of herbicides as a chemical weapon by the US military during the war left tangible, long-term impacts upon the Vietnamese people that persist in the country today. For instance, it led to three million Vietnamese people suffering health problems, one million birth defects caused directly by exposure to the chemical and 24% of Vietnam's land being defoliated.