Gerontology Research Group
The Gerontology Research Group maintains a top 30–40 list of oldest verified living people. The researchers estimate, based on a 0.15% to 0.25% survival rate of centenarians until the age of 110, that there should be between 300 and 450 living supercentenarians in the world. (See the List of the oldest living people for a top 100 of verified ages.) A study conducted in 2010 by the Max Planck Institute for Demographic Research found 663 validated supercentenarians, living and dead, and showed that the countries with the highest total number (not frequency) of supercentenarians (in decreasing order) were the United States, Japan, England plus Wales, France, and Italy. The first verified supercentenarian in human history was Dutchman Geert Adriaans Boomgaard (1788–1899), and it was not until the 1980s that the oldest verified age surpassed 115.