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 20:01:23 20:15:18 22 4 Jun 22, 2018 4 instances 04:35:25 06:02:05 10:51:22 11:03:39 Jul 7 Aug Sep Oct Nov Dec 2017 - 14 instances Jan 6 2 Jan 6, 2017 2 instances 16:39:01 16:41:38 10 Feb Mar Apr May Jun 21 6 Jun 21, 2017 6 instances 12:39:36 13:03:09 13:24:19 18:49:26 19:08:30 19:32:23 Jul Aug Sep Oct 2 2 Oct 2, 2017 2 instances 12:47:56 19:58:31 Nov 20 Dec 25 26 2016 - 8 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 2 Sep 19, 2016 2 instances 11:14:08 11:21:15 30 2 Sep 30, 2016 2 instances 20:49:10 20:57:02 Oct 3 3 Oct 3, 2016 3 instances 13:49:20 13:49:20 13:51:07 Nov Dec 29