20 instances from 3 years 2018 - 11 instances Jan Feb Mar Apr May Jun 21 22 4 Jun 22, 2018 4 instances 01:57:01 17:09:46 17:56:22 18:46:27 23 Jul 5 2 Jul 5, 2018 2 instances 10:13:53 11:59:06 6 3 Jul 6, 2018 3 instances 12:39:01 12:40:54 12:51:19 Aug Sep Oct Nov Dec 2017 - 4 instances Jan 19 Feb 6 Mar Apr May Jun 22 23 Jul Aug Sep Oct Nov Dec 2016 - 5 instances Jan Feb Mar 8 2 Mar 8, 2016 2 instances 21:20:08 21:20:11 Apr May Jun 30 2 Jun 30, 2016 2 instances 08:57:41 08:57:43 Jul Aug Sep 20 Oct Nov Dec