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
| Fecha | Valor | Cambiar, % |
|---|---|---|
| 2000 | 830,2 | 6,61 % |
| 1993 | 778,7 | 2,60 % |
| 1988 | 759,0 | -1,96 % |
| 1985 | 774,2 | -12,91 % |
| 1980 | 889,0 | -0,30 % |
| 1975 | 891,7 | 7,09 % |
| 1969 | 832,7 | -5,08 % |
| 1964 | 877,3 |