{| class="wikitable" border="1"
|-
! Ph.D. Programs by Number of Relevant Faculty
! Ph.D. Programs by Country
! Ph.D. Programs by State
|-
|<categorytree mode=pages>1 Faculty</categorytree>
<categorytree mode=pages>2 Faculty</categorytree>
<categorytree mode=pages>3 Faculty</categorytree>
<categorytree mode=pages>4 Faculty</categorytree>
<categorytree mode=pages>5 Faculty</categorytree>
<categorytree mode=pages>6+ Faculty</categorytree>
|<categorytree mode=pages>Australasia</categorytree>
<categorytree mode=pages>Canada</categorytree>
<categorytree mode=pages>United Kingdom</categorytree>
<categorytree mode=pages>United States</categorytree>
| row 1, cell 3
|-
| row 2, cell 1
| row 2, cell 2
| row 2, cell 3
|}
<categorytree mode=pages>1 Faculty</categorytree>
<categorytree mode=pages>2 Faculty</categorytree>