Visualization tutorial:Countries Export, Import Unit Values and External Debt with continents

I found the data from GapMinder web sites but they refer that data source is WorldBank.  My motion chart link is below: 

https://docs.google.com/spreadsheet/pub?key=0AvKFn0ElBBrcdGlQbDVjSnNXRkxtTTF2VVBIdFo0YkE&output=html