The provided stats illustrate how percentages of prices changed every month in copper, metal and zinc during 2014.
Overall, the number of metals declined over the period, except copper which remained stable. At the beginning of the year, nickel prices were high, while zinc prices ride at the end of the year. Additionally, nickel prices fluctuated during 2014.
Furthermore, nickel prices changed to 6% in January, then fell dramatically to -3% in June , before increasing by 1% at the end of the year. Likewise, a 1% change in the price of zinc at the start of the period, reached a peak at 3% in February, then dropped to -1% in the middle of the year in which the figure initially changed to 2% in December.
However, zinc was the smallest change in price in January it became the highest of these three metals at the end of the year. Moreover, zinc prices remained almost constant between June to October.