multiple conditions in proc sql

PROC SQL;
 SELECT WEIGHT,
 CASE
 WHEN WEIGHT BETWEEN 0 AND 50 THEN ’LOW’
 WHEN WEIGHT BETWEEN 51 AND 70 THEN ’MEDIUM’
 WHEN WEIGHT BETWEEN 71 AND 100 THEN ’HIGH’
 ELSE ’VERY HIGH’
 END AS NEWWEIGHT
 FROM HEALTH;
QUIT;