4-8 Jun 2018	GRPE | Session 77
7-11 Jan 2019	GRPE | Session 78
21-24 May 2019	GRPE | Session 79
14-17 Jan 2020	GRPE | Session 80
9-12 Jun 2020	GRPE | Session 81
12-15 Jan 2021	GRPE | Session 82
1-4 Jun 2021	GRPE | Session 83
11-14 Jan 2022	GRPE | Session 85
30 May-2 Jun 2022	GRPE | Session 86
10-13 Jan 2023	GRPE | Session 87
30 May-2 Jun 2023	GRPE | Session 89
9-12 Jan 2024	GRPE | Session 90
24-28 Jun 2024	WP.29 | Session 193
14-16 Oct 2024	GRPE | Session 91