Frequency

Effective Percentage

Cumulative percentage

Lack of variety

15

6.8

6.8

Not up-to-date

5

2.3

9.1

Divorced from reality

5

2.3

11.4

Not meet the needs

10

4.5

15.9

Very good

170

77.3

93.2

Others

15

6.8

100.0

In total

220

100.0