Is it just Indiana? Or just bad luck.
An hour's drive in Indiana can make a world of difference. I've had summers where I fed from spring to fall, while beeks 40 miles away were pulling record honey crops. Last summer I had great harvests while those same folks were complaining about empty supers. (For the record, 2009 in Indiana was a terrible year, with about half the average honey harvest.)
A few lean years can be discouraging, but hang in there. There's always hope that next year
will be a record harvest.