3. In 1990 there were 20.9 divorces for every 1000 married women over 15 years of age.

Sorry, this is true. The best indicator the divorce rate is the number of divorces per 1000 married women over 15 years of age. This statistic is the most accurate indicator of rate of divorce. This is the group of people who can actually divorce. Comparisons of this statistic across communities and over time will provide the most accurate picture of what the trends really are. (Note: A similar rate should be found using married men... it's close but never exactly the same...demographers trust women's reports of their marital status rather than men.... hmmm.)