| Frequency | Percentage | Cumulative percentage |
Rich and high-quality | 110 | 50.0 | 50.0 |
Not rich but high-quality | 40 | 18.2 | 68.2 |
A few and general-quality | 55 | 25.0 | 93.2 |
Lack of | 5 | 2.3 | 95.5 |
Others | 10 | 4.5 | 100.0 |
In total | 220 | 100.0 |
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