12 instances from 3 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 3 Jun 21, 2018 3 instances 20:29:57 20:43:43 20:45:05 22 3 Jun 22, 2018 3 instances 04:47:26 11:19:01 11:31:10 23 30 Jul Aug Sep Oct Nov Dec 2017 - 3 instances Jan Feb Mar Apr May Jun Jul Aug Sep Oct 2 Nov Dec 25 26