An indicator, developed by FAO, which represents the quality of the crop growing season. The NRI yearly results take into consideration the precipitation that year, the average precipitation over the period 1986-2000, the seasonality of the main crop-growing season (distinguishing between northern and southern hemispheres), and what areas of the country are wetter. The median of each five year period is provided. Note: due to methodological differences, this variable is not comparable to average precipitation
| Date | Value | Change, % |
|---|---|---|
| 2002 | 836 | 5.64% |
| 1997 | 791 | 6.97% |
| 1992 | 739 | -2.14% |
| 1987 | 756 | -2.52% |
| 1982 | 775 | 15.36% |
| 1977 | 672 | -0.93% |
| 1972 | 678 | -13.69% |
| 1967 | 786 |
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