According to the DOT, a male 55-64 averages 15,859 miles per year. The average for the US, all ages, both sexes, is 13,476. I can't find a distribution for those numbers to say how much of an outlier you are.

Anyway, if you had read the article you would see that he also drive his wife's car for long distances and as a retired airline pilot he gets free air travel. He was picked not for being representative but because he was the first.