置信度 | 2017 | 2018 | 2019 | 2020 | 2021 |
90% | 1.842 | 1.784 | 1.711 | 3.171 | 8.187 |
95% | 2.553 | 2.472 | 2.371 | 4.395 | 11.346 |
99% | 4.110 | 3.981 | 3.817 | 7.077 | 18.267 |