Most health problems are related to consumption of semi-raw seafood, limited food storage facilities, and bacterial contamination of fresh water supplies. In the early 2000s, between 1 and 7% of the population, depending on the island, were annually treated for food poisoning in a hospital. Modernization and cross-cultural exchange of the late 20th century brought new issues of unhealthy diet and lifestyle, heavy smoking, especially among the young, and external infections, including HIV/AIDS. Kiribati is the country with the third highest prevalence of smoking, with 54% of the population reported as smokers.