20 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 7 Jun 21, 2018 7 instances 07:03:04 07:03:07 07:08:23 18:56:13 19:07:10 19:11:29 20:46:02 22 Jul Aug Sep Oct Nov Dec 2017 - 2 instances Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 25 2 Dec 25, 2017 2 instances 06:16:17 15:28:56 2016 - 9 instances Jan Feb Mar Apr May Jun Jul Aug Sep 19 4 Sep 19, 2016 4 instances 18:10:35 18:16:10 18:16:10 18:16:18 Oct 1 2 Oct 1, 2016 2 instances 06:45:51 06:51:30 4 3 Oct 4, 2016 3 instances 01:52:43 01:59:44 02:06:16 Nov Dec