“Since 2000, sub‑Saharan Africa has more than doubled primary enrolment and more than tripled secondary enrolment; in low‑income countries, secondary enrolment has almost quadrupled. Over the same period, the school‑age population fell by 9% in upper‑middle‑ and high‑income countries, rose by 25% in lower‑middle‑income countries and doubled in low‑income countries…

Since 2000, the completion rate has increased from 77% to 88% in primary education (92% if very late completers are considered), from 60% to 78% in lower secondary education (82% with very late completers) and from 37% to 61% in in upper secondary education (64.5% with very late completers). In other words, the upper secondary completion rate has grown by 0.8 percentage points per year since 2000. Looking at historical rates of progress, the world would achieve 95% upper secondary completion by 2105 in the average scenario, by 2081 in the fast expansion scenario (at the 75th percentile), and by 2062 in the fastest expansion scenario (average of top 25%)…

Between 2000–04 and 2020–24, repetition rates fell by two thirds in primary and by 40% in lower secondary education. As systems expanded and quality declined, repetition rose and slowed progress, but over time students improved their progression.”

From UNESCO.