| Collocate | 1810-1850 | 1960-2000 | Difference |
| RETARDED | 0.000000 | 0.592912 | 0.592912 |
| PRESCHOOL | 0.000000 | 0.313574 | 0.313574 |
| DISABLED | 0.000000 | 0.250116 | 0.250116 |
| AUTISTIC | 0.000000 | 0.230778 | 0.230778 |
| BATTERED | 0.000000 | 0.170482 | 0.170482 |
| HYPERACTIVE | 0.000000 | 0.142698 | 0.142698 |
| INNER | 0.000000 | 0.127150 | 0.127150 |
| DISADVANTAGED | 0.000000 | 0.108272 | 0.108272 |
| EXCEPTIONAL | 0.000000 | 0.101380 | 0.101380 |
| DEFECTIVE | 0.000000 | 0.101102 | 0.101102 |