20 instances from 4 years 2018 - 3 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 03:25:21 03:25:56 03:26:50 Jul Aug Sep Oct Nov Dec 2017 - 6 instances Jan 7 2 Jan 7, 2017 2 instances 10:45:18 12:26:59 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 20:16:59 20:19:55 Jul Aug Sep Oct 2 Nov Dec 25 2016 - 10 instances Jan Feb Mar Apr May Jun 20 Jul Aug Sep 19 3 Sep 19, 2016 3 instances 17:10:54 17:14:34 17:17:13 Oct 1 2 Oct 1, 2016 2 instances 01:37:41 01:42:36 3 3 Oct 3, 2016 3 instances 17:17:48 17:22:40 17:23:12 Nov Dec 30 2015 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 17