22 instances from 4 years 2018 - 3 instances Jan Feb Mar Apr May Jun 21 23 24 Jul Aug Sep Oct Nov Dec 2017 - 4 instances Jan 8 Feb Mar Apr May Jun 23 Jul Aug Sep Oct 5 Nov Dec 29 2016 - 14 instances Jan Feb 17 Mar Apr May Jun 21 2 Jun 21, 2016 2 instances 09:59:09 11:58:06 22 Jul Aug Sep 20 4 Sep 20, 2016 4 instances 14:01:39 16:25:16 21:56:00 22:13:40 Oct 1 2 Oct 1, 2016 2 instances 21:10:28 23:50:37 4 3 Oct 4, 2016 3 instances 18:28:22 18:52:18 21:52:33 Nov Dec 30 2015 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 16