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Prevalence of Tuberculosis in 1956 and 1970. 
Population 10 years and over: **Population 15 Years and over.
Source: WHO Archives,
Geneva, Project Files, Sri Lanka–75 1965–72 TUB 1, BCG/TBC, Dr S. Grzybowski,
Assignment Report on Tuberculosis Control, 25 June 1971, Annex 1, Table 8, 4.
| Survey population | No. of positives | Prevalence % | % of estimated prevalence of total population | |
|---|---|---|---|---|
| 1956 | 16 225* | 26 | 1.602 | 1.146 |
| 1970 | 12 468** | 16 | 1.285 | 0.743 |
