Prevalence in epidemiology is the proportion of disease found to have been affecting a particular population (typically a disease or a risk factor such as smoking or seat-belt use).
Exclusive analysis by The Daily Telegraph reveals the price of an average basket of groceries at any Coles and Woolworths supermarket in Sydney has jumped a staggering 16 per cent since 2009. That adds as much as $26 a week to the average bill.he analysis found that if a shopper today purchased the identical basket of groceries used in Choice's 2009 Supermarket Survey, they would pay more than $158 for what two years ago cost $136. CommSec economist Craig James said the average household currently spends $185 a week on food.
Gallup has released new poll results on how much Americans spend on food per week. The last time Gallup asked this question was 1987, in which the average amount spent per week on food was $108. Over 20 years later, that number has climbed to $151. To give some perspective, in 1943 an average of $15 was spent on food per week (not adjusted for inflation). Interestingly enough, Americans used to spend more on food in the 1960s, with an all-time high at $234 in 1966 and 1967. The chart below illustrates that spending does vary significantly among respondents, with eight percent of the respondents spending less than $50 per week on food and 10 percent spending $300 or more.