How can I find ratings for shows pre-2010?

Hi y'all,

I'm trying to find the ratings for Sex and the City, but I can't find anything besides IMDB. But those sites contain ratings from the modern day. I want to find the ratings per-episode as they came out. The kinds of ratings that showrunners use to make the week-by-week decisions on how to alter the show. Is there anywhere that I can find those?

Thank you!