15 instances from 2 years 2018 - 14 instances Jan Feb Mar Apr May 24 29 Jun 21 22 3 Jun 22, 2018 3 instances 17:10:24 17:16:06 18:18:10 23 Jul 3 5 3 Jul 5, 2018 3 instances 12:41:34 15:51:46 16:32:39 6 3 Jul 6, 2018 3 instances 12:30:23 13:13:57 18:47:50 Aug Sep Oct Nov Dec 2017 - 1 instance Jan Feb Mar Apr May Jun 22 Jul Aug Sep Oct Nov Dec