| 2020 52. | 7% | | | | | | | 7 | | | | | | | | | 1 - 3 | | | 4 | | | | 0 | 6 13 | | | | | | | | | ? | | | | | | | | | | | | | | | | | | | | OK | | | | | | 2%~4% | | | | | | | | | | | | | | | | | | | | | | | | |