data
| Date | L日 | L晚 | L夜 |
|---|---|---|---|
| dB | dB | dB | |
| 2021-Q4 | 62.7 | 52.7 | 51.6 |
| 2021-Q3 | 61.1 | 52.5 | 52.4 |
| 2021-Q2 | 64.4 | 55.2 | 54.8 |
| 2021-Q1 | 61.6 | 62.4 | 53.6 |
| 2020-Q4 | 64.9 | 53.6 | 52.3 |
| 2020-Q3 | 63.2 | 64.4 | 54.1 |
| 2020-Q2 | 66.9 | 59.2 | 59.6 |
| 2020-Q1 | 63.5 | 55.4 | 54.8 |
| 2019-Q4 | 63.3 | 53.5 | 54.0 |
| 2019-Q3 | 64.7 | 54.8 | 65.5 |
| 2019-Q2 | 65.7 | 56.5 | 58.1 |
| 2019-Q1 | 62.8 | 52.5 | 50.7 |
| 2018-Q4 | 62.0 | 56.4 | 53.1 |
| 2018-Q3 | 61.0 | 52.2 | 52.0 |
| 2018-Q2 | 77.0 | 72.3 | 70.1 |
| 2018-Q1 | 76.1 | 71.4 | 69.7 |
| 2017-Q4 | 75.2 | 70.6 | 68.5 |
| 2017-Q3 | 74.9 | 67.8 | 70.1 |
| 2017-Q2 | 74.9 | 67.7 | 69.4 |
| 2017-Q1 | 78.7 | 75.7 | 70.3 |
| 2016-Q4 | 77.2 | 70.5 | 71.1 |
| 2016-Q3 | 72.1 | 66.1 | 65.9 |
| 2016-Q2 | 76.8 | 71.4 | 67 |
| 2016-Q2 | 76.8 | 71.4 | 67 |
| 2016-Q1 | 75.4 | 70.5 | 69.1 |
| 2015-Q4 | 76.2 | 73.3 | 69.4 |
| 2015-Q3 | 75.4 | 69.9 | 71.5 |
| 2015-Q2 | 75.8 | 71.9 | 69.2 |
| 2015-Q1 | 63.4 | 57.3 | 54.1 |
| 2014-Q4 | 76.5 | 71.2 | 69.9 |
| 2014-Q3 | 68 | 70 | 69 |
| 2014-Q2 | 72 | 73 | 76 |
| 2014-Q1 | 74 | 75 | 66 |
| 2013-Q4 | 75.4 | 72.5 | 68.8 |
| 2013-Q3 | 74.0 | 70.4 | 66.6 |
| 2013-Q2 | 75.7 | 74.2 | 69.7 |
| 2013-Q1 | 75.0 | 72.1 | 69.1 |