15 instances from 4 years 2019 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep 23 Oct Nov Dec 2018 - 4 instances Jan Feb Mar Apr May Jun 21 4 Jun 21, 2018 4 instances 04:09:19 04:09:49 04:12:47 04:15:29 Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan 6 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 03:51:21 03:56:23 Jul Aug Sep Oct 2 Nov Dec 2016 - 6 instances Jan Feb Mar Apr May Jun Jul Aug Sep 30 2 Sep 30, 2016 2 instances 18:23:07 18:28:42 Oct 3 3 Oct 3, 2016 3 instances 10:26:19 10:26:29 10:26:29 Nov Dec 29