30 instances from 4 years 2019 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep 18 Oct Nov Dec 2018 - 7 instances Jan Feb Mar Apr May Jun 21 2 Jun 21, 2018 2 instances 20:04:18 20:18:12 22 4 Jun 22, 2018 4 instances 04:36:34 10:54:08 11:06:25 23:51:06 23 Jul Aug Sep Oct Nov Dec 2017 - 14 instances Jan 6 2 Jan 6, 2017 2 instances 16:42:37 16:45:11 10 Feb Mar Apr May Jun 21 6 Jun 21, 2017 6 instances 12:42:18 13:05:51 13:27:01 18:52:05 19:11:09 19:35:02 Jul Aug Sep Oct 2 2 Oct 2, 2017 2 instances 12:50:40 20:01:11 Nov 20 Dec 25 26 2016 - 8 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 2 Sep 19, 2016 2 instances 11:17:16 11:24:24 30 2 Sep 30, 2016 2 instances 20:53:27 21:01:17 Oct 3 3 Oct 3, 2016 3 instances 13:56:05 13:56:06 13:57:34 Nov Dec 29