Peptic ulcers are present in around 4% of the population. New ulcers were found in around 87.4 million people worldwide during 2015. About 10% of people develop a peptic ulcer at some point in their life. Peptic ulcers resulted in 267,500 deaths in 2015, down from 327,000 in 1990. The first description of a perforated peptic ulcer was in 1670, in Princess Henrietta of England. "H. pylori" was first identified as causing peptic ulcers by Barry Marshall and Robin Warren in the late 20th century, a discovery for which they received the Nobel Prize in 2005.