The Jubilee index.

The author reflects on which high-value commodity could be put forward for the 100th Jubilee spot in the U.S. as of July 2012. He believes the link between an anniversary and the particular commodity associated with it could be proportional to the item's value, such as paper, cotton and leather celebrating the first five years. He is proposing oil, which has reached a price of around 100 U.S. dollars per barrel (bbl), to have that 100th Jubilee spot.