statistics

Where would I find statistics for the state and federal prison populations (both total and broken down by gender)for 1970, 1971, 1972 or 1973? I checked the Bureau of Justice Statistics site, but its reports only go back to 1977.

I'm doing a research project in which I try to estimate the cost of health care for prisoners as a function of age. The best way (that I can think of) to do this is to find the prison health care spending of each state, and also the prison population characteristics.
The question is, does anyone know where I can find prison population statistics that include age? I need this for each state, and/or the federal prison system. If someone knows how to use census data files, that might help - their summary statistics don't have enough information to be useful.
Thanks for your time.

hello,
i am struggling trying to find import vs use statistics. i would like, for example, to figure out how much steel we use in america vs how much steel is imported from latin america. i've only been able to find a website called the "trade stats express", and it is not super helpful. any other ideas?
thanks

What are the rates of vegetarianism in different countries and worldwide? I am particularly interested in whatever is known about rates of vegetarianism in Asia and Africa.