20 instances from 4 years 2020 - 3 instances Jan Feb Mar Apr May Jun 28 Jul 4 30 Aug Sep Oct Nov Dec 2018 - 3 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 04:06:45 04:07:15 04:10:13 Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan 6 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 03:47:46 03:52:47 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 10:16:21 10:20:52 10:20:56 10:21:36 30 2 Sep 30, 2016 2 instances 18:21:55 18:27:30 Oct 3 3 Oct 3, 2016 3 instances 10:25:07 10:25:17 10:25:17 Nov Dec 29