There are credit and debit transactions.
Maybe the wallet is just empty...

But I think you should exact the bitcoin addresses from it (pwallet), and check those on any online blockchain explorer like [Suspicious link removed].
If there's any balance there we can help you recovering it given the wallet.dat file is not encrypted or you know the passphrase.

If you need assistance with extracting the bitcoin addresses from your wallet.dat file, please send me a pm. I prefer a chat on skype for example for assisting people because a forum is too much work too keep track of all the things I do.