| Session 14 (Nara, 16 January 2015) | 14 | 2015-01-16 |
| Session 15 (London, 6 March 2015) | 15 | 2015-03-06 |
| Session 16 (Berlin, 19 June 2015) | 16 | 2015-06-19 |
| Session 17 (Brussels, 11 September 2015) | 17 | 2015-09-11 |
| Session 18 (Geneva, 6 November 2015) | 18 | 2015-11-06 |