Need help finding beef industry data for a linear regression model

I am building some regression models of the beef industry and i cant seem to find data on historical American Per-Capita beef consumption (# of pounds) or the  average sales price per pound or per head. I will continue to search for data but if you know where i could find this, it would be greatly appreciated. The years i am concentrating on are 1980 to the present.
Thanks

I had to one for my precalc class. I did mine on calf mortality rates by year for il. I got all of my info from the national ag statistics...if you Google nass it comes up. One of my teachers has another great ag stat site so I will get that from him and share it.
On the nass site you have to go thru the different things...you ll figure it out.

Please share that site when you find out..I will need some stuff like that for a class next semester.