It was estimated in 2020 that dementia affected about 50 million people worldwide. This is an increase on the 2016 estimate of 43.8 million, and more than double the estimated 20.2 million in 1990. The number of cases is increasing by around 10 million every year. About 10% of people develop the disorder at some point in their lives, commonly as a result of aging. About 3% of people between the ages of 65–74 have dementia, 19% between 75 and 84, and nearly half of those over 85 years of age. In 2016 dementia resulted in about 2.4 million deaths, up from 0.8 million in 1990.