28 instances from 4 years 2019 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep 18 Oct Nov Dec 2018 - 8 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 20:25:45 20:39:31 20:39:36 22 4 Jun 22, 2018 4 instances 04:45:42 10:21:10 11:14:57 11:27:07 Jul 9 Aug Sep Oct Nov Dec 2017 - 10 instances Jan 6 Feb Mar Apr May Jun 21 6 Jun 21, 2017 6 instances 13:03:20 13:26:49 13:47:52 19:12:38 19:31:52 19:55:33 Jul Aug Sep Oct 2 Nov Dec 25 26 2016 - 9 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 4 Sep 19, 2016 4 instances 11:38:32 11:44:11 11:44:22 11:45:47 30 2 Sep 30, 2016 2 instances 21:30:31 21:35:25 Oct 3 3 Oct 3, 2016 3 instances 14:41:44 14:42:33 14:42:33 Nov Dec