You never even started.
And...look at the documentation provided, which not only gives the mean age but the average age (23-24).
The statistics bust the LDS propgated myth that girls regularly got married at an early age in the 19th century. IT WAS NOT THE NORM. IN FACT, IT WAS OUTSIDE OF THE NORM!
And why did your alleged prophet lie about his polygamous marriages to teenage girls and to married women?
The cited truth offends, doesn't it?