The map allows then seeing the evolution of the universal primary education in the diversity and the process of each country's trajectories. It significantly shows the courses' inequality of countries such as Niger, Burkina Faso, Mali, ..., etc. which all the decennial occurrences gather in the lower left quadrant of the graph contrasting with the Mauritanian trajectory, close to the profile of these countries in the decade 80, but significantly moving away in the decades 90 and beginning of the 2000's thanks to a remarkable enrolment effort in the primary.

The pre-eminence of the adult literacy rate positively related to the net enrolment rate might show the propensity of literate parents to send more their children to school. The enrolment growth marked by an increase of this net enrolment rate could result of an improvement - that can be historically easy spotted - of this literacy for some countries that took part in the different past experiences. The adult literacy rate appears to be an important factor that enables some countries to realize earlier their "take-off" as far as the primary schooling is concerned.

If the net enrolment rate underestimates the schooling cover and only gives an average value, insufficient to describe the learning life of the pupils, the "survival rate in 5th grade" provides this additional information. It is then possible to assess some level of achievement in primary school necessary for the perpetuation of any kind of literacy tuition. We noticed that they are no obvious link between the two indicators. The counter-example of Equatorial Guinea in the beginning of the 2000's suggests that the net enrolment rate must be coupled with a satisfactory survival rate in the 5th grade to actually improve the future literacy rate.

The assessment of the universal primary education progress made obviously necessary the setup of monitoring indicators. Criticisms already occurred regarding the pertinence of the taken into account indicators. It seems today that the notion of "education profile" including both the access rate and achievement rate enables a more suited assessment to the achieved progress and above all to what remains to achieve.

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