16 instances from 3 years 2018 - 3 instances Jan Feb Mar Apr May Jun 21 22 26 Jul Aug Sep Oct Nov Dec 2017 - 5 instances Jan 6 Feb Mar Apr May Jun 21 2 Jun 21, 2017 2 instances 13:32:34 15:49:36 Jul Aug Sep Oct 2 Nov Dec 26 2016 - 8 instances Jan Feb Mar Apr May Jun 23 Jul Aug Sep 19 3 Sep 19, 2016 3 instances 17:15:22 19:12:14 19:34:49 30 2 Sep 30, 2016 2 instances 23:47:01 23:51:20 Oct 3 2 Oct 3, 2016 2 instances 17:10:04 18:05:27 Nov Dec