Divorce rates among couples in their 50s and older are increasing. People are living longer, and many people find that once their kids are grown and out of the house, they no longer have things in common. Sometimes they simply aren't happy anymore. Why spend what could possibly be another few decades of your life in an unhappy marriage?
One may assume that women fare worse financially than their husbands in these divorces. They were raised in generations where the men handled the finances in the family. Perhaps they spent little, if any, time in the workplace because they stayed home and raised the children.