Note: Australia is generally considered to be a continental landmass, rather than an island. If however one does count Australia among the islands it, not Greenland, would be the largest in the world (unless one also considered Antarctica an island).
... age or older. The median age is 39 years. For every 100 females there are 104.2 males. For every 100 females age 18 and over, there are 97.8 males.
The median income for ...