6 instances from 2 years 2018 - 5 instances Jan Feb Mar Apr May 24 Jun Jul 5 2 Jul 5, 2018 2 instances 19:28:21 19:59:11 6 2 Jul 6, 2018 2 instances 14:52:39 16:11:46 Aug Sep Oct Nov Dec 2017 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep 2 Oct Nov Dec