20 instances from 3 years 2017 - 2 instances Jan 6 2 Jan 6, 2017 2 instances 15:01:48 15:01:49 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2016 - 16 instances Jan Feb 17 Mar Apr May Jun 20 3 Jun 20, 2016 3 instances 09:23:36 15:33:03 17:28:21 21 24 Jul Aug Sep 20 4 Sep 20, 2016 4 instances 04:43:00 04:45:35 04:45:35 04:46:43 Oct 1 2 Oct 1, 2016 2 instances 13:39:18 13:45:03 4 3 Oct 4, 2016 3 instances 04:38:27 04:38:51 04:40:26 Nov Dec 29 2015 - 2 instances Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 16 18