Lots of poor usage of numbers here…
As CTL pointed out, divorce rate and percentage of people whose status is divorced are not comparable.
Also, if I’m not mistaken, the divorce rate refers to the percentage of marriages which end in divorce, not the percentage of the population who got divorced, so the fact that in the secular world the trend is for people not to get married is not necessarily going to affect the divorce rate.
If you want to compare the changing divorce rate in the frum community to the rate outside of the frum community, you would need to show the rates for each over a period of time.
Comparing by overall numbers, not as a percentage, would be almost entirely meaningless.