20 instances from 4 years 2018 - 1 instance Jan Feb Mar Apr May Jun Jul 6 Aug Sep Oct Nov Dec 2017 - 8 instances Jan Feb Mar Apr May Jun Jul 29 2 Jul 29, 2017 2 instances 03:42:50 03:43:11 Aug Sep 26 2 Sep 26, 2017 2 instances 13:31:32 13:31:35 Oct 2 2 Oct 2, 2017 2 instances 01:53:43 01:53:46 3 2 Oct 3, 2017 2 instances 01:58:01 01:58:04 Nov Dec 2016 - 8 instances Jan Feb 17 2 Feb 17, 2016 2 instances 15:16:07 15:16:11 Mar Apr May Jun 20 4 Jun 20, 2016 4 instances 08:32:30 08:32:33 08:53:02 08:53:05 Jul Aug Sep Oct 3 2 Oct 3, 2016 2 instances 22:12:48 22:12:51 Nov Dec 2015 - 3 instances Jan Feb Mar Apr May Jun Jul Aug Sep Oct 15 Nov Dec 16 2 Dec 16, 2015 2 instances 12:41:29 12:41:32