BeginPackage["Wikicode`Gallium`"]
Production::usage="Production[date] gives the annual world gallium production from the specified date."
Begin["`Private`"]
Production[from_Integer]:=Select[galliumData["Production"],DateDifference[{from},#[[1]]] >= 0&]
galliumData["Production"]=MapAt[{Round@#}&,#,1]&/@Import["http://minerals.usgs.gov/ds/2005/140/ds140-galli.xlsx"][[1,36;;74,{1,9}]]
End[]
EndPackage[]
