The abscissa is the marriage rate, and the ordinate is the probability that women can live to 65 years old. The points distributed above represent the situation of each country. So you can see the proportion of married people in each country and the probability that women will live to 65. The abscissa is the number of marriages per 1000 people per year.

The downward sloping straight line is a correlation curve made according to each point, but the following note points out that R square is equal to 0.353, indicating that the correlation is weak. The closer this value is to 1, the higher the fitting degree is. This curve shows that the higher the marriage rate, the less likely women are to live to 65.

I don't know what the marriage rate here has to do with your early marriage. If it is hard to understand, it is that a high marriage rate means early marriage. So from this curve, early marriage does not make women live longer. But the fitting degree of this curve is low, so. . . . . . Hey, that's all I can understand. Come on!

By the way, if the abscissa represents the average marriage age, it is consistent with your paper.