The divorce rate in America for first marriage is 41%
The divorce rate in America for second marriage is 60%
The divorce rate in America for third marriage is 73%
I thought this was also worth noting:
The divorce rate in America for childless couples and couples with children
According to discovery channel, couples with children have a slightly lower rate of divorce than childless couples.
Sociologists believe that childlessness is also a common cause of divorce. The absence of children leads to loneliness and weariness and even in the United States, at least 66 per cent of all divorced couples are childless.