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Summary table of inspection data for the coating classification status.
| Number of detections | Level | ||
|---|---|---|---|
| Level I (excellent and good) | Level II (normal) | Level III (bad) | |
| 1 (2009.06) | 0.6399 | 0.3200 | 0.0401 |
| 2 (2012.07) | 0.4198 | 0.4101 | 0.1701 |
| 3 (2015.07) | 0.3198 | 0.4100 | 0.2702 |
| 4 (2018.06) | 0.2698 | 0.4000 | 0.3302 |
| 5 (2021.08) | 0.2451 | 0.3901 | 0.3648 |
