30 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 4 Jun 21, 2018 4 instances 14:40:05 15:09:09 15:16:26 15:24:16 22 3 Jun 22, 2018 3 instances 02:53:51 10:15:02 10:27:13 23 Jul Aug Sep Oct Nov Dec 2017 - 12 instances Jan Feb Mar Apr May Jun 21 6 Jun 21, 2017 6 instances 10:18:18 10:20:37 10:22:10 12:06:30 18:18:52 19:01:54 Jul Aug Sep Oct 2 2 Oct 2, 2017 2 instances 10:14:28 19:25:27 Nov 8 2 Nov 8, 2017 2 instances 20:18:52 20:19:01 Dec 25 2 Dec 25, 2017 2 instances 13:14:34 15:18:05 2016 - 9 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 4 Sep 19, 2016 4 instances 10:14:46 10:20:13 10:20:17 10:21:23 30 2 Sep 30, 2016 2 instances 19:21:59 19:27:57 Oct 3 3 Oct 3, 2016 3 instances 12:00:03 12:00:09 12:03:05 Nov Dec