#دراسة الحالة
60%
60%
35%
35%
35%
35%
35%
51%
51%
58%
58%
60%
56%
56%
64%
64%
64%
51%
51%
51%
51%
51%
51%
58%
58%
58%
39%
64%
64%
64%
55%
56%
60%
