The Marketing Explorer

Apple(s AAPL) has about 400 stores in 14 countries, and they are at peak traffic — 370 million people walked through their doors last year.  But as the data below shows, while Apple is selling more iPhones, iPads and Macs than ever, it’s having a hard time keeping up on the retail store front. Horace Dediu at Asymco pulled together the data in a chart that shows how Apple isn’t building new stores fast enough relative to its expanding sales.

Apple’s net sales have taken off since the dawning of the iPhone era. New store ribbon cuttings were at their highest in 2008 — 47 opened that year — when net sales were at about $10 billion. But since then, Apple’s net sales per year have reached $40 billion and store openings haven’t been opening at the same rate.

Also during that time, Apple’s revenue from sales in its own stores…