18 instances from 4 years 2018 - 3 instances Jan Feb Mar Apr May Jun 21 3 Jun 21, 2018 3 instances 03:35:00 03:36:19 03:37:16 Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 20:23:16 20:26:04 Jul Aug Sep Oct 2 Nov Dec 25 2016 - 10 instances Jan Feb Mar Apr May Jun 20 2 Jun 20, 2016 2 instances 11:23:50 13:19:20 Jul Aug Sep 19 3 Sep 19, 2016 3 instances 17:17:05 17:20:43 17:23:29 Oct 1 3 3 Oct 3, 2016 3 instances 17:23:59 17:28:49 17:29:22 Nov Dec 30 2015 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 17