Why do you only have 7000 songs listed when others have over 10,000 songs?

I personally own over 1000 CD's with an average of 10 songs per CD for 10,000 songs.  Unfortunately, most of those albums were purchased for only one or two songs.  Our music database is not inflated with songs that you have never heard of and what I consider to be unplayable.  Case in point,  Los Del Rio had exactly one hit "Macarena" but produced six albums.