| 2020 | 47566 2019 | 43491 4075 | 9.4% 2019 0.7 | 2020 | | 7.7% | | | | | | | 49918 | | 43569 | | 48066 | | 18 8 | | 69794 | 64946 | 55784 | 33851 | 34835 | 36460 | | | | 1. | 1 | | 2 | | | | | | | | | | | 3 | | | = / | | | 2. | | | | | | | | | | | 3. | | | | | | | 4. | | | | | | 5. | | GB / T 4754 - 2017 | | 6. | 2020 | |