28 instances from 4 years 2019 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep 18 Oct Nov Dec 2018 - 8 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 20:27:10 20:40:55 20:41:21 22 4 Jun 22, 2018 4 instances 04:46:18 10:47:05 11:16:19 11:28:28 Jul 4 Aug Sep Oct Nov Dec 2017 - 11 instances Jan 6 10 Feb Mar Apr May Jun 21 6 Jun 21, 2017 6 instances 13:04:42 13:28:28 13:49:13 19:13:59 19:33:12 19:56:53 Jul Aug Sep Oct 2 Nov Dec 25 26 2016 - 8 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 4 Sep 19, 2016 4 instances 11:39:55 11:45:35 11:45:46 11:47:10 30 2 Sep 30, 2016 2 instances 21:32:27 21:37:41 Oct 3 2 Oct 3, 2016 2 instances 14:45:07 14:45:12 Nov Dec