pgdg yum repos missing versions <10 ?

I'm having difficulty locating and pulling down the PostgreSQL 9.6 server package from the pgdg YUM repository.  Versions 10 and newer are working for me. Am I doing something wrong?

-Jeremy


[root@ip-172-31-39-28 ~]# yum repository-packages pgdg12 list|grep postgresql.*server || echo NOT FOUND
postgresql12-server.x86_64                     12rc1-2PGDG.rhel6          pgdg12

[root@ip-172-31-39-28 ~]# yum repository-packages pgdg11 list|grep postgresql.*server || echo NOT FOUND
postgresql11-server.x86_64                      11.5-1PGDG.rhel6          pgdg11

[root@ip-172-31-39-28 ~]# yum repository-packages pgdg10 list|grep postgresql.*server || echo NOT FOUND
postgresql10-server.x86_64                    10.10-1PGDG.rhel6           pgdg10

[root@ip-172-31-39-28 ~]# yum repository-packages pgdg96 list|grep postgresql.*server || echo NOT FOUND
NOT FOUND

[root@ip-172-31-39-28 ~]# yum repository-packages pgdg95 list|grep postgresql.*server || echo NOT FOUND
NOT FOUND

[root@ip-172-31-39-28 ~]# yum repository-packages pgdg94 list|grep postgresql.*server || echo NOT FOUND
NOT FOUND

-- 
Jeremy Schneider
Database Engineer
Amazon Web Services