Sentence:  A bare two per cent of the country—six million acres squeezed between the vast rainless deserts—was capable of sustaining life, and the population was increasing by half a million human beings every year. <WSD>Anagraphically</WSD> and ecologically, the prospects were appalling. 
Meaning of the word marked with <WSD> tags:  Involving or pertaining to anagraphic data.