The list below shows alumni PhDs in mathematics & statistics completed from 2005-2014.
I’ve included NESCAC schools, plus other colleges in the “Baccalaureate/Liberal Arts I” Carnegie class that have 10 or more alumni-earned doctorates, plus a few research universities for comparison. I show enrollments for the NESCAC schools and the top 15.
165 Berkeley (~27K undergrads)
136 Harvard (~6700 undergrads)
116 MIT (~4500 undergrads)
112 UChicago (~5700 undergrads)
79 Caltech (~1000 undergrads)
69 Princeton (~5400 undergrads)
66 Harvey Mudd (~800 students)
60 Stanford (~7000 undergrads)
36 St. Olaf College (~3000 students)
36 Williams College (~2100 students)
30 Carleton College (~2000 students)
29 Oberlin College (~2900 student)
28 Pomona College (~1700 students)
25 Reed College (~1400 undergrads)
25 Swarthmore College (~1600 students)
21 Whitman College
18 Wheaton College, Wheaton
16 Amherst College (~1800 students)
15 Bryn Mawr College
15 Haverford College
13 Tufts (~5100 students)
13 Bucknell University
13 Grinnell College
13 University of Puget Sound
12 Davidson College
12 Lafayette College
12 Smith College
12 University of Minnesota, Morris
11 Wesleyan (~2900 students)
11 Furman University
11 Kenyon College
11 Macalester College
11 Spelman College
11 Wellesley College
11 Wesleyan University (~2900 students)
10 Bowdoin College (~1800 students)
10 College of the Holy Cross
10 Franklin & Marshall College
10 Knox College
10 New College of Florida
9 Bates College (~1800 students)
7 Trinity College, Hartford (~2300 students)
6 Middlebury College (~2500 students)
5 Colby College (~1800 students)
4 Hamilton College (~1900 students)
3 Connecticut College (~1900 students)
Source: NSF/Webcaspar