20 instances from 4 years 2018 - 2 instances Jan Feb Mar Apr May Jun 21 2 Jun 21, 2018 2 instances 05:09:26 05:09:38 Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 08:32:39 08:39:49 Jul Aug Sep Oct 2 Nov Dec 25 2016 - 13 instances Jan Feb Mar Apr May Jun 20 4 Jun 20, 2016 4 instances 09:50:27 11:00:25 11:58:09 12:42:17 Jul Aug Sep 19 4 Sep 19, 2016 4 instances 14:16:54 14:28:23 14:36:46 14:40:53 30 2 Sep 30, 2016 2 instances 20:44:19 20:47:15 Oct 3 3 Oct 3, 2016 3 instances 12:50:59 12:59:43 13:16:23 Nov Dec 2015 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 16