Life expectancy in Greece is among the highest in the world; a 2011 OECD report placed it at 80.3 years, above the OECD average of 79.5, while a more recent 2017 study found life expectancy in 2015 to be 81.1 years, slightly above the EU average of 80.6. The island of Icaria has the highest percentage of nonagenarians in the world; approximately 33% of islanders are 90 or older. Icaria is subsequently classified as a "blue zone", a region where people allegedly live longer than average and have lower rates of cancer, heart disease, or other chronic illnesses.