9 instances from 2 years 2019 - 1 instance Jan Feb Mar Apr May Jun Jul Aug Sep 18 Oct Nov Dec 2018 - 8 instances Jan Feb Mar Apr May Jun 21 7 Jun 21, 2018 7 instances 08:19:03 08:19:29 08:27:52 19:01:50 19:12:45 19:17:04 21:09:50 22 Jul Aug Sep Oct Nov Dec