Building my credit score?

I have no credit and last yr around April I took out a small personal loan from my credit union for as much as they would allow me to with no Co-Signer ($500). I could have been paid it off but the bank lady told me if I want to improve my credit that I should pay on it for at least a year so thats what I've been doing and on time. So my question is does anyone know about where that would put my credit score?