Google it. There is no universally agreed upon method to to come up with a divorce rate. It's never been anywhere near 50%.

You don't need to have a calculator handy to see a problem with the numbers. There are over 60 million married couples in America. The number of divorces in a given year average around 800,000. That's a lot of divorce, but it has never has been as high as one million.

In a given year, weddings have always out-paced divorces. Usually by a rate greater than 2 to 1. So, the married person replenishment rate remains high.

Quoting the "married person replenishment rate" and calling it the divorce rate is statistically dishonest. It leads some people to think that there is a 50/50 chance that a couple will divorce. That has never been true. The chance that a couple will divorce in 2018 is about 1 out of 85.

To be statistically honest, a researcher would have to pick a year like 1998 and examine all of the weddings. Then they would have to look at the status of those marriages today. If that was possible you'd be able to see how many of those couples are still married and arrive at some sort of failure rate.

Comparing the number of weddings to the number of divorces in 2018 says nothing. It's apples and oranges.