U of Phoenix-Idaho Campus is first with 91.9%.

Incidentally, both are private and for-profit.

surpassed ITT Technical Institute-Spokane Valley (71.3%), Brown Mackie College-Boise (67.5%), CollegeAmerica-Stevens Henager College (61.8%), and Heritage Univ (59.7%), and others, ending with Whitman College (0.6%).

14 out of the other 41 colleges were ruled out due to missing, unknown, or not-applicable values for undergrads who are 25 years or older, e.g., Stevens-Henager College-Logan.

1. Information on numbers and ages of the undergrad and graduate student body is from the file enrollment by age, gender, attendance status, and level of student: Fall 2012 (Provisional release) as reported by the National Center for Education Statistics (http://nces.ed.gov/ipeds).
   
2. Distance calculations between two colleges use a mathematical formula for the distance on a sphere between two points.
   

ITT Technical Institute-Boise is in Boise, ID, is private and for-profit, degree-granting, has its top Associates major in nursing, has its top major in criminal justice, is on the quarter system, and enrolls fewer than 1,000 students.

• average full-time teaching salary ($55,564)
• in-state undergrad tuition & fees ($18,048)
• out-of-state undergrad tuition & fees ($18,048)
• average undergrad student loan ($9,128)
• average grant aid to undergrads ($4,880)
• endowment per full-time student ($0)
• in-state freshmen (100%)
• undergrads who get financial aid (95%)
• undergrads who get Pell grants (80%)
• undergrads who are 25 years or older (76%)
• undergrads who receive student loans (75%)
• ratio of female full-time freshmen (35.3%)
• minorities (9.3%)
• Hispanics (6.7%)
• tuition & fees increase over three years (5.2%)
• average teaching salary differential (men vs. women, 2.8%)
• Blacks or African Americans (1.2%)
• American Indians or Alaska Natives (0.7%)
• Asians (0.7%)
• non-resident tuition & fees surcharge (0%)
• foreign students (0%)
• average teaching salary differential (women vs. men, -2.8%)
• alumni who played in the National Football League (0)
• average January temperature (31.3 degrees)
• first-year applicants (119)
• foreign students (0)
• full-time undergrads (244)
• members of the National Academy of Sciences (0)
• men's basketball Final Four appearances (0)
• Rhodes Scholar alumni (0)
• undergrads (342)
• yearly for-credit students (721)
• on-campus yearly property crimes per thousand students (0)
• students per faculty member (12)
• annual rainfall (11.7 inches)
• elevation (801 meters)

Sources