| Year | Rice Yields (mt/ha) |
| 1961 | 1.088 |
| 1962 | 1.016 |
| 1963 | 0.950 |
| 1964 | 1.341 |
| 1965 | 0.997 |
| 1966 | 0.959 |
| 1967 | 0.890 |
| 1968 | 0.857 |
| 1969 | 0.836 |
| 1970 | 1.174 |
| 1971 | 0.977 |
| 1972 | 1.348 |
| 1973 | 0.527 |
| 1974 | 0.724 |
| 1975 | 0.914 |
| 1976 | 1.116 |