| Year 1992: |
2.5% |
| |
Source : National
Health Survey 1992, Ministry of Health |
| |
|
| Year 1998: |
6.7% |
|
| |
Source: National
Health Survey 1998, Ministry of Health |
| |
| Year
2001: |
7.9% |
|
| |
Source : National
Health Surveillance Survey 2001, Ministry of Health |
| |
| Year 20041: |
6.6% |
| |
Source : National
Health Survey 2004, Ministry of Health |
| |
Remarks
1Survey of 2004 took into account young women aged 18-29 |
| |
|