18 instances from 3 years 2018 - 4 instances Jan Feb Mar Apr May Jun 21 4 Jun 21, 2018 4 instances 04:19:36 04:20:06 04:23:01 04:26:25 Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan 6 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 04:02:47 04:07:50 Jul Aug Sep Oct 2 Nov Dec 2016 - 10 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 4 Sep 19, 2016 4 instances 10:20:48 10:25:18 10:25:22 10:26:12 30 2 Sep 30, 2016 2 instances 18:26:42 18:32:17 Oct 3 3 Oct 3, 2016 3 instances 10:29:54 10:30:04 10:30:04 Nov Dec 29