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| seg_id | accountno | impno | tax_year | occ_code |
|---|---|---|---|---|
| 1 | A1 | 1 | 2018 | T1 |
| 5 | A1 | 1 | 2018 | T1 |
| 2 | A1 | 1 | 2019 | T2 |
| 6 | A1 | 1 | 2019 | T2 |
| 3 | A1 | 1 | 2020 | T3 |
| 7 | A1 | 1 | 2020 | T4 |
| 4 | A1 | 1 | 2021 | T5 |
| 8 | A1 | 1 | 2021 | T5 |