Archive: List of Survey Effectiveness Results by years as follows:
List of Customer Service Satisfaction Survey Result for 2019
| No | Customer Service Satisfaction Survey Result 2019 |
| 1 | First Quarter Result |
| 2 | Second Quarter Result |
| 3 | Third Quarter Result |
| 4 | Fourth Quarter Result |
List of Customer Service Satisfaction Survey Result for 2018
| No | Customer Service Satisfaction Survey Result |
| 1 | First Quarter Result |
| 2 | Second Quarter Result |
| 3 | Third Quarter Result |
| 4 | Fourth Quarter Result |
List of Customer Service Satisfaction Survey Result for 2017
| No | Customer Service Satisfaction Survey Result |
| 1 | First Quarter Result |
| 2 | Second Quarter Result |
| 3 | Third Quarter Result |
| 4 | Fourth Quarter Result |
List of Customer Service Satisfaction Survey Result for 2016
| No | Customer Service Satisfaction Survey Result |
| 1 | First Quarter Result |
| 2 | Second Quarter Result |
| 3 | Third Quarter Result |
| 4 | Fourth Quarter Result |