| Variable | Year | Supplement |
|---|---|---|
| POLDT_Y4 | 2003 | Child immunization |
| POLDT_Y4 | 2002 | Child immunization |
| POLDT_Y4 | 2001 | Child immunization |
| POLDT_Y4 | 2000 | Child immunization |
| POLDT_Y4 | 1999 | Child immunization |
| POLDT_Y4 | 1998 | Child immunization |
| POLDT_Y4 | 1997 | Child immunization |
| POLIOYR4 | 1996 | Immunization |
| POLIOYR4 | 1995 | Immunization |
| POLIOYR4 | 1994 | Immunization |
| POLIOYR4 | 1993 | Immunization |
| POLIOYR4 | 1992 | Immunization |
| POLIOYR4 | 1991 | Child health |