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There is a strong correlation "(R (square)2>0.6" ) between the TCP throughput and NRI. The TCP throughput is measured from the US, so we have not included countries near US (Canada, Mexico etc) as they are expected to have greater TCP throughput due to their proximity to the US. Africa is mostly at the bottom with NRI less than 3.3 and TCP throughput mostly less than 1000 Kb/sec. Europe and East Asia are mostly at the top. In South Asia (large orange squares) though India has the largest NRI it is between Pakistan and Sri Lanka in its TCP throughput.
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