I recently married my childhood sweetheart.
That is awesome, did this come out of about by an extension of friendship or physical attraction?
I would say by an extension of friendship. Do most teenage relationships last?
Not really, because it is a transitional stage of physical and psychological development 
I see, so what percentage of high school sweethearts end in divorce?
Divorce
Divorce, also known as dissolution of marriage, is the process of terminating a marriage or marital union. Divorce usually entails the canceling or reorganizing of the legal duties and responsibilities of marriage, thus dissolving the bonds of matrimony between a married couple under the rule of law of the particular country or state. Divorce laws vary considerably around the world, but in most countries divorce requires the sanction of a court or other authority in a legal process, which may involve issues of distribution of property, child custody, alimony
Childhood sweetheart
Childhood sweetheart is a reciprocating phrase for a relationship (but not a partnership) between young persons. This may come about by an extension of friendship, physical attraction or develop from natural affinity.
The relationship is usually platonic and lasts a short to medium period of time. This experience forms the basis of subsequent future relationships later in childhood and/or adulthood. Usually, an individual will have no more than one childhood sweetheart as this term is indicative of a milestone in the growth, development and maturity of a