24 instances from 4 years 2018 - 3 instances Jan Feb Mar Apr May Jun 21 2 Jun 21, 2018 2 instances 17:39:53 23:16:35 22 Jul Aug Sep Oct Nov Dec 2017 - 5 instances Jan 7 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 13:33:18 13:56:03 Jul Aug 30 Sep Oct 2 Nov Dec 2016 - 15 instances Jan Feb 17 Mar Apr May Jun 20 2 Jun 20, 2016 2 instances 16:43:43 21:15:25 21 2 Jun 21, 2016 2 instances 11:52:16 14:03:33 Jul Aug Sep 19 4 Sep 19, 2016 4 instances 17:18:21 21:07:41 21:29:10 21:50:56 Oct 1 2 Oct 1, 2016 2 instances 06:32:44 07:15:56 3 3 Oct 3, 2016 3 instances 20:36:41 20:53:32 21:13:21 Nov Dec 29 2015 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 16