| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 2013 | 2015 | 2017 | | | | | | | 5000 | 500 | | | 300 | 2020 | | | | | | | | | 2021 | | 1000 | | | | | | | | | | 3500--8000 | | | | | | | | | | | | 4000 | | 6000 | | 6. | 1 2 | 2021 4 | | | | | | | | | | | | | | | | | | | | | | | | | | |