Punished UMN wrote:My guess is that NHA means to say that the average length of a straight monogamous marriage is 5 years, though obviously, as with most averages, the median is more reflective than the mean, because a large portion of marriages end at the extremes of length (i.e. are very short or very long).
Based on my research, that doesn't seem accurate either.
Studies suggest that 20 percent of marriages end within the first five years and that this number increased by 12 percent within 10 years. But between 10 years and 15 years, the rate only increases about 8 percent, implying that one of the safest stages of your marriage is between years 10 and 15.
Source
It sounds like about 32% of married couples divorce within 10 years and 40% of married couples divorce within 15 years. To quote another source...
On average, the typical U.S. marriage that ends in divorce lasts just eight years.3 Worldwide, the average length of marriage can vary widely by country. In Italy, for example, the typical couple stays married for 17 years and the divorce rate is around 42%.4 In Qatar, on the other hand, the divorce rate is 69.5%, with marriages lasting less than 5 years on average.
This sounds a bit more reasonable. I suspect the 32% of marriages that last fewer than 10 years skew a bit low, dragging down the overall total. I have a suspicion as well that we're only looking at data sets for couples who divorced as opposed to all couples since a couple staying married for more than 20 years, as close to 50% of couples do, would skew the numbers much, much higher.