Components of unit costs, by country and selected characteristics.

All figures are in percentages except those in the first row, which are in 2012 US$ and PPP-adjusted to the sub-Saharan Africa region.除第一行数据外，其余所有数值均以百分比为单位；第一行数据以2012年美元计价，并已针对撒哈拉以南非洲地区进行购买力平价（PPP，Purchasing Power Parity）调整。