Adding multiple entries at once?

[BDC]

I've been logging my gas mileage in a spreadsheet for over a year now (about 100 entries for 2 cars) and I'd like to put it all online, but my time is at a premium right now and I don't really care to go through all of it at once. Is there any way to input a string of data or straight from a spreadsheet? This seems like a big investment to start an online gaslog if one has already been doing it independently.

Thanks,
Ben