Nerf Herder, those figures are for how many people read NOTW, not buy it. They work this out for every newspaper - sales figures and readership. So one family member buys a copy that is also read by 3 others in the household, meaning you times the sales figures by 3 or 4. They are fairly accurate and tracked every month, as its based on these figures a newspaper decides how much to charge for advertising space.
Yes, lots of older people and couples who maybe are, dare I say, stuck in their ways, reading NOTW and The Sun. The target demographic is the people who collect the vouchers for the very popular 'holiday for a tenner' annual offer.
Men in their twenties, or teens, don't really buy newspapers much. They read sports news online, on their smart phones - yep, even the builders. Women don't either. The under-30s is the smallest group of newspaper buyers, because they get it all online.
Although said men are probably going on NOTW and The Sun's website, and hits to the website count just as much, if not more, than newspaper sales especially in terms of advertising revenue.