Shoutbox

ok here is my question.

i have a list of 2000+ music albums that i have collected over the years.

and what i want to do is have it it automatically total up all the :
rock
pop
rap
dance
soundtrack

lists that i have, but i want it to automatically keep count as i add more to each list.

how would i go about doing this?

thanks

p.s. i have searched on google and found nothing.