From the USCCB:
This month brings the sixth anniversary of the pope’s election — a brief length of time for an institution that “thinks in centuries” — yet of the178 Latin rite dioceses and archdiocese in the U.S., 86, or 48 percent of them, are headed by bishops appointed by this pope. Take into account the five or so vacant dioceses awaiting new bishops, the eight U.S. bishops currently serving past the retirement age of 75, as well as one coadjutor bishop, and Pope Benedict is poised to jump well past the halfway point.