18 instances from 4 years 2020 - 4 instances Jan Feb Mar Apr May Jun 28 Jul 4 Aug Sep Oct Nov 12 2 Nov 12, 2020 2 instances 22:11:29 22:17:09 Dec 2018 - 4 instances Jan Feb Mar Apr May Jun 21 4 Jun 21, 2018 4 instances 04:14:48 04:15:19 04:18:15 04:21:38 Jul Aug Sep Oct Nov Dec 2017 - 5 instances Jan 6 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 03:59:22 04:04:23 Jul Aug Sep Oct 2 Nov 20 Dec 2016 - 5 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 2 Sep 19, 2016 2 instances 11:17:25 11:21:45 30 2 Sep 30, 2016 2 instances 19:25:19 19:30:36 Oct Nov Dec 29