Reinhold Messner (born September 17, 1944) is one of the most accomplished climbers of the 20th century, notable as the first to ascend Mount Everest without supplementary oxygen, for a solo ascent of Nanga Parbat[?], and as the first to climb all 14 eight-thousanders[?] (peaks over 8,000 meters). He also wrote a number of books about his experiences.
... 18, 8.1% from 18 to 24, 29.9% from 25 to 44, 23.8% from 45 to 64, and 7.9% who are 65 years of age or older. The median age is 35 years. For every 100 females there are ...