Statistics on Religion in America Report -- The 2007 Pew Forum on Religion & Public Life Survey estimates that although Tibetan Buddhism adherents are less than 0.3 percent of the population, Buddhism has had a 0.5 net increase in reported adherents.
state.gov
The 2007 U.S. State Department report on religious freedom in Bhutan notes that "Mahayana Buddhism is the state religion..." and that the Bhutanese government supports both the Kagyu and Nyingma sects. State.gov
