Gold versus copper shows much the same thing.
Lastly, when looking at the past highs in gold and silver in 1980 as adjusted for a more realistic CPI, as calculated by Shadowstats.com, shows that the earlier all-time high for gold of $850.00 on January 21, 1980 would be $7,824 per troy ounce in terms of SGS-Alternate-CPI-adjusted dollars. In like manner, the all-time high price for silver in January 1980 of $49.45 per troy ounce has not been hit since, including in terms of inflation-adjusted dollars. Based on SGS-Alternate-CPI-adjusted dollars the 1980 silver price peak would be $455 per troy ounce.
In other words, hold your gold & silver. This train hasnít even left the station.
(Full article from 'The Dollar Vigilante' linked below)