20 instances from 3 years 2018 - 3 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 03:25:24 03:26:00 03:26:53 Jul Aug Sep Oct Nov Dec 2017 - 6 instances Jan 7 2 Jan 7, 2017 2 instances 10:45:22 12:27:02 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 20:17:02 20:19:58 Jul Aug Sep Oct 2 Nov Dec 25 2016 - 11 instances Jan Feb Mar Apr May Jun 20 2 Jun 20, 2016 2 instances 09:03:20 09:36:26 Jul Aug Sep 19 3 Sep 19, 2016 3 instances 17:10:57 17:14:37 17:17:16 Oct 1 2 Oct 1, 2016 2 instances 01:37:44 01:42:39 3 3 Oct 3, 2016 3 instances 17:17:52 17:22:43 17:23:15 Nov Dec 30