| 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 |
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