ACS1 tables without ACS5

I can understand if there is not enough data for an ACS1 table and therefore there is an ACS5 without an accompanying ACS1 table.  What about ACS1 tables like S0201 without an ACS5 table? Clearly, there must be enough data.  I like to view \ compare ACS1 and ASC5 and was assuming (yes I know what that means) that in general ACS1 tables had ACS5 counterparts.  I think this is fairly rare but am not sure. Any feedback is appreciated.