Thanks for the data.
I'm currently trying to write a tool that can also calculate the balances based on the chainstate LevelDB. However, the deserialization of the values seems very complex (see https://github.com/bitcoin/bitcoin/blob/d4a42334d447cad48fb3996cad0fd5c945b75571/src/coins.h#L21). I'm curious if you were able to reuse any code of the bitcoin core client or if you rewrote everything by yourself.