Correct, it is currently 13 years plus. Anyway, it's just historical data, not helpful in predicting future numbers.
Take this: subtract the currently needed seniority number for command from your own. Then divide this number by 70 or 80, because that is pretty much the max number of Captains Cathay's training system seems to be able to produce in a year ( remember the small detail of a necessity to actually pass a course).