Saudi Arabia leads all countries with the biggest improvement in social progress since 2011, gaining about 10.70 points.
Cambodia is among the top improvers, raising its score by around 9.87 points over the same period.
Armenia and Vietnam also made major gains, with increases of about 9.81 and 9.80 points respectively.
Kenya features among those countries having improved significantly, with a gain of about 9.57 points.
The improvements are concentrated mostly in lower- and middle-income countries.
