As it turns out, this is how the data are given in the original
dataset:
http://data.worldbank.org/indicator/SP.DYN.IMRT.IN?cid=GPD_55.
So, there doesn't appear to be any problem on our side.
If you'd like to ask the World Bank for more information about this
particular case, please do so by following the provider link in the
lower left hand corner of the visualization.
Hope this helps,
Benjamin Yolken
Product Manager, Google Public Data Explorer