年份 | 2017 | 2018 | 2019 | 2020 | 2021 |
预测值 | 20135.49 | 21860.19 | 23841.31 | 25849.29 | 27666.79 |
标准差 | 173.99 | 442.64 | 680.22 | 973.35 | 1321.97 |
实际值 | 20066.30 | 21588.80 | 23605.80 | 25002.79 | 27894.02 |
相对误差 | 0.34% | 1.26% | 1.00% | 3.39% | −0.81% |