What Does This Say About My Credit Rating?

I got my first (and only) credit card a little over two years ago. I've never used more than 25% of my available credit. I've made every payment on time and in full. The bank has raised my credit limit. I am being bombarded with offers of credit cards from other banks and loan offers from lending institutions. Local businesses are making me credit offers. Does this mean I'm getting a good credit rating?