Centenarian

A centenarian is a person who has reached the age of 100 years. Because life expectancies worldwide are below 100, the word centenarian is usually linked to longevity. The United States has the most centenarians, while Japan is second. 

Much more rare is a supercentenarian, who is a person that has lived to be at least 110.  Famous supercentenarians have included Harry Patch, who was the last surviving British soldier of the First World War trenches.  He died on 25 July 2009 (aged 111).  For the last seven days of his life he was Britain's oldest man.  Henry Allingham, another First World War veteran, had died a week earlier (aged 113). "Then there were none", The Mail on Sunday, 26 July 2009 p.16

Other websites
 Centenarians’ Road 
 The Okinawa Centenarian Study
 New England Centenarian Study 
 Salt of the Red Earth: Wit, wisdom and portraits of 100 Oklahoma centenarians
 Living to 100 and Beyond: Search for Predictors of Exceptional Human Longevity 
 Mortality of Centenarians 
 Purple Medical Blog Predictors of Reaching 100 Years Old..How To Live A Long Life.. A Quiz  
 U.S. politicians who lived the longest 
 Noted Nonagenarians and Centenarians
 Centenarian research & celebration
 Table of numbers of centenarians for select nations, 1960 and 1990 

References