Samoa: lowest 10%: NA%

highest 10%: NA%

San Marino: lowest 10%: NA%

highest 10%: NA%

Sao Tome and Principe: lowest 10%: NA%

highest 10%: NA%

Saudi Arabia: lowest 10%: NA%

highest 10%: NA%

Senegal: lowest 10%: 1.4%

highest 10%: 42.8% (1991)