19 instances from 4 years 2018 - 3 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 03:35:31 03:36:32 03:37:29 Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 20:23:28 20:26:17 Jul Aug Sep Oct 2 Nov Dec 25 2016 - 11 instances Jan Feb Mar Apr May Jun 20 3 Jun 20, 2016 3 instances 08:39:48 09:11:31 13:20:14 Jul Aug Sep 19 3 Sep 19, 2016 3 instances 17:17:18 17:20:56 17:23:42 Oct 1 3 3 Oct 3, 2016 3 instances 17:24:12 17:29:01 17:29:34 Nov Dec 30 2015 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 18