25 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 6 Jun 21, 2018 6 instances 12:17:24 12:28:44 12:49:54 13:02:42 13:07:22 13:07:26 22 Jul Aug Sep Oct Nov Dec 2017 - 15 instances Jan 6 2 Jan 6, 2017 2 instances 20:58:51 20:58:59 7 Feb Mar Apr May Jun 21 6 Jun 21, 2017 6 instances 08:40:09 08:42:44 08:43:42 13:56:17 14:37:07 14:45:38 Jul Aug Sep Oct 2 2 Oct 2, 2017 2 instances 08:16:38 14:33:47 Nov 8 2 Nov 8, 2017 2 instances 19:58:34 19:58:36 Dec 25 2 Dec 25, 2017 2 instances 11:01:39 11:14:09 2016 - 2 instances Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 29 30