How does a country develop so quickly?

The First tazi in Abadan.
Other countries have moved a fair amount. Tunisia, for example, saw a steady decline in voice and accountability, which measures aspects like confidence in elections and freedom of the press, from 1996 to 2010. Then the Arab Spring happened. In 2011, Tunisia jumped from the 9th percentile to the 36th and has grown steadily since then; in 2016, it was on par with Hungary at the 57th percentile.