Annulment = Catholic church sanctioned divorce.
Nuff said.
The RCC is in no position to lecture ANYONE about divorce rates with the finessing of Scripture they do to justify it.
That will be denied by them (and of course, Scripture can only authoritatively mean what Rome says it means, and she can presume to bind what God has loosed and vice versa), however, the broadness and variety of criteria under which a marriage may be declared by Rome as never having qualified as a marriage (and which potentially means multitudes of married Catholics may also may not be truly married) could nullify some of the marriages in Scripture.
See http://en.wikipedia.org/wiki/Canonical_impediment#List_of_diriment_impediments_to_marriage. http://www.vatican.va/archive/ENG1104/_P3Z.HTM see also post http://www.freerepublic.com/focus/religion/2979388/posts?page=44#44]
Also, it may be seen as rather contradictory in principal that Rome considers entering marriage with the intention of never having children to be a "grave wrong and more than likely grounds for an annulment."[McLachlan, P. "Sacrament of Holy Matrimony." http://www.catholicdoors.com/faq/qu164.htm] , while praying to a women who apparently went thru with a marriage intending to do just that, according to Rome. ["Our lady intended to remain a virgin," by Pope John Paul II http://www.ewtn.com/library/papaldoc/jp2bvm27.htm]
Again you are woefully uninformed on the church..after a very thorough investigation, an annulment is granted when it can be shown that for a small variety of reasons, the marriage was not valid in the first place....pretty involved procedure.