tied with UChicago, Notre Dame, and Wake Forest, all with 0.1%.

Incidentally, all 4 are a top-100 happiest school.

beat Virginia Military Inst. (0.2%), Colgate (0.2%), Princeton (0.2%), and Carleton College (0.2%), and others, ending with Hazelden Graduate School of Addiction Studies (100%).

1,445 out of the other 3,121 colleges were ruled out due to missing, unknown, or not-applicable values for undergrads who are 25 years or older, e.g., Dell'Arte International School of Physical Theatre.

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).
   

Grinnell College is in Grinnell, IA, is private and nonprofit, is in the Midwest Conference, degree-granting, a top-100 happiest school, offers on-campus housing, has a Phi Beta Kappa chapter, accepts the Common Application, requires test scores for undergrad admissions, its top major is economics, is on the semester system, and enrolls from 1,000 to 4,999 students.

• USNews Liberal Arts College ranking (17th place)
• Wall St. Journal feeder school ranking (44th place)
• PayScale mid-career median salary ranking (367th place)
• endowment per full-time student ($832,645)
• research spending ($800K)
• average full-time teaching salary ($83,096)
• in-state undergrad tuition & fees ($41,004)
• out-of-state undergrad tuition & fees ($41,004)
• average grant aid to undergrads ($29,728)
• cost of a shared room ($4,504)
• average undergrad student loan ($4,488)
• research spending per student ($436)
• full-time retention rate (95%)
• undergrads who get financial aid (88%)
• ratio of female full-time freshmen (55%)
• undergrads who receive student loans (52%)
• undergrads who get Pell grants (25%)
• minorities (19.3%)
• tuition & fees increase over three years (12.4%)
• foreign students (10.8%)
• average teaching salary differential (men vs. women, 9.7%)
• in-state freshmen (8.6%)
• Hispanics (7.7%)
• Asians (6%)
• Blacks or African Americans (5.3%)
• American Indians or Alaska Natives (0.3%)
• undergrads who are 25 years or older (0.1%)
• non-resident tuition & fees surcharge (0%)
• average teaching salary differential (women vs. men, -8.8%)
• 25th percentile SAT math score (650)
• 25th percentile SAT reading score (630)
• 75th percentile SAT math score (750)
• 75th percentile SAT reading score (750)
• alumni who played in the National Football League (2)
• average January temperature (19.4 degrees)
• dorm capacity (1,340)
• first-year applicants (4,554)
• foreign students (189)
• full-time undergrads (1,615)
• members of the National Academy of Sciences (0)
• men's basketball Final Four appearances (0)
• Rhodes Scholar alumni (14)
• undergrads (1,674)
• yearly for-credit students (1,744)
• on-campus yearly property crimes per thousand students (9.17)
• students per faculty member (9)
• annual rainfall (36.6 inches)
• diversity and inclusion ratio (0.24)
• elevation (311 meters)

Sources