It seems to be "Rising Above the Gathering Storm: Energizing and Employing America for a Brighter Economic Future"
Answer:
The Indians traded furs for such goods as tools and weapons. Beaver fur, which was used in Europe to make felt hats, became the most valuable of these furs. The fur trade prospered until the mid-1800's, when fur-bearing animals became scarce and silk hats became more popular than felt hats made with beaver.
There is no graph, so I can not answer your question.
Yes they can involve the 12th amendment.
