20 instances from 4 years 2020 - 1 instance Jan Feb Mar Apr May Jun 28 Jul Aug Sep Oct Nov Dec 2018 - 3 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 02:37:28 02:37:30 02:37:39 Jul Aug Sep Oct Nov Dec 2017 - 5 instances Jan 6 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 08:08:31 08:14:22 Jul Aug Sep Oct 2 Nov Dec 25 2016 - 11 instances Jan Feb Mar Apr May Jun 20 2 Jun 20, 2016 2 instances 11:24:22 11:29:08 Jul Aug Sep 19 3 Sep 19, 2016 3 instances 14:57:47 15:09:25 15:17:27 30 2 Sep 30, 2016 2 instances 21:25:12 21:27:43 Oct 3 3 Oct 3, 2016 3 instances 13:31:56 13:41:34 13:58:25 Nov Dec 29