| Term | Definition |
| George Washington | 1 |
| John Adams | 2 |
| Thomas Jefferson | 3 |
| James Madison | 4 |
| James Monroe | 5 |
| John Quincy Adams | 6 |
| Andrew Jackson | 7 |
| Martin Van Buren | 8 |
| William Henry Harrison | 9 |
| John Tyler | 10 |
| James Knox Polk | 11 |
| Zachary Taylor | 12 |
| Millard Fillmore | 13 |
| Franklin Pierce | 14 |
| James Buchanan | 15 |
| Abraham Lincoln | 16 |
| Andrew Johnson | 17 |
| Ulysses Simpson Grant | 18 |
| Rutherford Birchard Hayes | 19 |
| James Abram Garfield | 20 |
| Chester Alan Arthur | 21 |
| Grover Cleveland | 22 |
| Benjamin Harrison | 23 |
| Grover Cleveland | 24 |
| William McKinley | 25 |
| Theodore Roosevelt | 26 |
| William Howard Taft | 27 |
| Woodrow Wilson | 28 |
| Warren Gamaliel Harding | 29 |
| Calvin Coolidge | 30 |
| Herbert Clark Hoover | 31 |
| Franklin Delano Roosevelt | 32 |
| Harry S. Truman | 33 |
| Dwight David Eisenhower | 34 |
| John Fitzgerald Kennedy | 35 |
| Lyndon Baines Johnson | 36 |
| Richard Milhous Nixon | 37 |
| Gerald Rudolph Ford | 38 |
| James Earl Carter, Jr. | 39 |
| Ronald Wilson Reagan | 40 |
| George Herbert Walker Bush | 41 |
| William Jefferson Clinton | 42 |
| George Walker Bush | 43 |