| 2021 | Volume 7 | No.1 (Mar.) | No.2 (Jun.) | No.3 (Sep.) | No.4 (Dec.) | 
| 2020 | Volume 6 | No.1 (Mar.) | No.2 (Jun.) | No.3 (Sep.) | No.4 (Dec.) | 
| 2019 | Volume 5 | No.1 (Mar.) | No.2 (Jun.) | No.3 (Sep.) | No.4 (Dec.) | 
| 2018 | Volume 4 | No.1 (Mar.) | No.2 (Jun.) | No.3 (Sep.) | 
| 2017 | Volume 3 | No.1 (Feb.) | No.2 (Apr.) | No.3 (Jun.) | No.4 (Aug.) | 
| 2016 | Volume 2 | No.1 (Feb.) | No.2 (Apr.) | No.3 (Jun.) | No.4 (Aug.) | 
| 2015 | Volume 1 | No.1 (Apr.) | No.2 (Jun.) | No.3 (Aug.) | No.4 (Oct.) | No.5 (Dec.) | 

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