Founded in 1931, the American Association of Nurse Anesthetists (AANA) is the professional organization representing approximately 90 percent of the nation’s CRNAs. AANA members number nearly 59,000, including CRNAs and student registered nurse anesthetists. More than 40 percent of the nation’s nurse anesthetists are men, compared to approximately 10 percent in the nursing profession as a whole. The AANA headquarters is located in Rosemont, Illinois, with a satellite office in Washington, D.C.