The American Society of PeriAnesthesia Nurses (ASPAN;www.aspan.org) is a national organization serving nurses practicingin ambulatory surgery, preanesthesia, and postanesthesia care. Theorganization's membership is listed below.
| State/Region | Membership |
| Alabama | | 138 | |
| Arizona | | 489 | |
| Maryland, Delaware, DC | | 551 | |
| Connecticut | | 273 | |
| Florida | | 522 | |
| Georgia | | 461 | |
| Hawaii | | 87 | |
| Maine | | 145 | |
| Minnesota, Dakotas | | 385 | |
| Missouri, Kansas | | 194 | |
| Mississippi | | 87 | |
| Nebraska | | 73 | |
| North Carolina | | 387 | |
| Nevada | | 64 | |
| New Jersey, Bermuda | | 531 | |
| Alaska, Idaho, Montana,Oregon, Washington | | 640 | |
| New York | | 966 | |
| Ohio | | 888 | |
| Oklahoma | | 164 | |
| Arkansas | | 93 | |
| Illinois | | 498 | |
| Indiana | | 362 | |
| Iowa | | 128 | |
| Kentucky | | 205 | |
| Louisiana | | 158 | |
| Michigan | | 467 | |
| Massachusetts | | 341 | |
| California | | 1,098 | |
| New Mexico | | 37 | |
| Pennsylvania | | 371 | |
| Rhode Island | | 65 | |
| Colorado | | 247 | |
| South Carolina | | 284 | |
| Texas | | 1,108 | |
| Tennessee | | 219 | |
| Utah | | 87 | |
| Virginia | | 353 | |
| Vermont, New Hampshire | | 134 | |
| Wisconsin | | 257 | |
| West Virginia | | 60 | |
find standard deviation, first and third quartile, and thelimits for the outliers
