Healthcare in India is the responsibility of constituent states and territories of India. The Constitution charges every state with "raising of the level of nutrition and the standard of living of its people and the improvement of public health as among its primary duties". The National Health Policy was endorsed by the Parliament of India in 1983 and updated in 2002. The art of Health Care in India can be traced back nearly 3500 years. From the early days of Indian history the Ayurvedic tradition of medicine has been practiced. During the rule of Emperor Ashoka Maurya (third century B.C.E.), schools of learning in the healing arts were created. Many valuable herbs and medicinal combinations were created. Even today many of these continue to be used. During his rein there is evidence that Emperor Ashoka was the first leader in world history to attempt to give health care to all of his citizens, thus it was the India of antiquity which was the first state to give it's citizens national health care. In recent times India has eradicated mass famines however the country still suffers from high levels of malnutrition and disease especially in rural areas. Water supply and sanitation in India is also a major issue in the country and many Indians in rural areas lack access to proper sanitation facilities and safe drinking water. However, at the same time, India's health care system also includes entities that meet or exceed international quality standards. The medical tourism business in India has been growing in recent years and as such India is a popular destination for medical tourists who receive effective medical treatment at lower costs than in developed countries. .