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United States of America - National rainfall index

938.7
(mm)
in 2002

Though United States of America rainfall index fluctuated substantially in recent years, it tended to increase through 1969 - 2002 period ending at 938.7 mm in 2002.

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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 938.7 -6.60 %
1996 1,005.0 -1.47 %
1992 1,020.0 4.66 %
1984 974.6 2.68 %
1981 949.2 -5.83 %
1974 1,008.0 5.86 %
1969 952.2 2.55 %
1965 928.5