The provided table illustrates how much oil was produced per day in four particular nations, namely Nigeria, Chad, Congo, and Somalia, over the span of four years (2000-2004). Overall, all of the countries except Congo experienced an upward trend. Notably, Congo and Nigeria had similarly high production levels throughout the period.
Regarding the countries which experienced growth, they saw various shifts, at different rates. Having started the period at 205,000, the figure for Nigeria increased gradually to 210,000 in 2001, before decreasing noticeably by 20,000 in the next year. After that, production in Nigeria rose to 213,000 by the end of the period. As far as Chad and Somalia are concerned, the former did not begin producing oil until 2002, while the latter had already increased its production from 5,000 to 17,000 over the same period. However, both of them reached the same amount (50,000) in the final year.
By contrast, Congo had the highest production initially. Starting the period at 275,000, the amount of oil produced in Congo declined steadily to just over 200,000 in the final year, without any rise during the period.