BeginPackage["Wikicode`Cobalt`"]
Production::usage="Production[date] gives the annual world cobalt production from the specified date."
Begin["`Private`"]
Production[from_Integer]:=Select[cobaltData["Production"],DateDifference[{from},#[[1]]] >= 0&]
cobaltData["Production"] =
MapAt[{Round@#} &, #, 1] & /@
Import["http://minerals.usgs.gov/ds/2005/140/ds140-cobal.xlsx"][[1,
7 ;; 117, {1, 13}]]
End[]
EndPackage[]
