| | | | | | | | | | 50% | | | | 60% | | | 80% 2019 1 1 | 12 31 | | | | 6 | | 6 50% | | | | | 36 36 | | | 2000 1500 1000 | 2019 1 1 2020 12 | 31 | 12 12 | |