20 instances from 4 years 2020 - 2 instances Jan Feb Mar Apr May Jun 28 Jul 4 Aug Sep Oct Nov Dec 2018 - 3 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 05:18:09 05:21:06 05:23:57 Jul Aug Sep Oct Nov Dec 2017 - 5 instances Jan 6 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 05:16:43 05:21:49 Jul Aug Sep Oct 2 Nov Dec 25 2016 - 10 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 4 Sep 19, 2016 4 instances 10:49:59 10:54:21 10:54:25 10:55:06 30 2 Sep 30, 2016 2 instances 18:57:22 19:02:51 Oct 3 3 Oct 3, 2016 3 instances 11:00:30 11:00:31 11:00:35 Nov Dec 29