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Frequency of histological grades derived in 2015, 2016, 2017 and 2018
| Grade 1 | Grade 2 | Grade 3 | |
|---|---|---|---|
| 2015 (n = 562) | 89 (15.8%) | 306 (54.4%) | 133 (23.7%) |
| 2016 (n = 603) | 112 (18.6%) | 327 (54.2%) | 133 (22%) |
| 2017 (n = 666) | 114 (17.1%) | 369 8 (55.4%) | 155 (23.3%) |
| 2018 (n = 383) | 73 (19.06%) | 210 (54.8%) | 83 (21.7%) |
| Total mean | 17.64% | 54.7% | 22.67% |
