At times like this I wish music sales reporters were able to keep track of age demographics the way that TV ratings do.
Since everyone's speculating that it's mostly old folk who rarely use iTunes who are largely responsible for the domination.
iTunes:
#55 Ireland
#69 United Kingdom
#70 Canada
#100 Spain
#108 United States
#164 United States
#184 France
#190 India
#196 Switzerland
#197 Belgium