Google says the average is about 13,500/year (11-18 figure). You bought it at about 13,800/year (allowing for the truck being 13 months old when purchased), so basically dead on average. If you only drive it 5,000/year, you'll have a well below average mileage truck if you ever sell it, which will bring you more money and make it sell faster. To me, you made a great purchase.
Mine was well above average, and I drive above average, but I'm banking on the truck being good for 250,000-300,000 miles without anything major beyond suggested service. And, I really liked the one I found.