In the WashPost:

Vatican officials estimate that in 2002, the most recent year for which statistics are available, about 70 percent of all annulment requests were made in the United States. Worldwide, more than 56,000 Catholics requested annulments; 46,000 were granted. “Requests have jumped enormously in the last decades,” said Bishop Velasio De Paolis, a Vatican court official. As recently as 1968, fewer than 350 annulments were granted in the United States.