Here's a link:
http://www.ojp.usdoj.gov/bjs/cp.htm
Evidence of the huge upsurge in Hispanic inmates:
http://www.ojp.usdoj.gov/bjs/cp.htm
Now federal prisons have a few drug lords, but still only a little more than half. But federal prisons are specifically meant to hold federal offenders, so it makes sense that they'll have their fair share of drug runners.
"Federal prisons were estimated to hold 176,268 sentenced inmates as of Sept. 30, 2006. Of these, 16,507 were incarcerated for violent offenses, including 2,923 for homicide, 9,645 for robbery, and 3,939 for other violent crimes. In addition, 10,015 inmates were serving time for property crimes, including 519 for burglary, 6,437 for fraud, and 3,059 for other property offenses. A total of 93,751 were incarcerated for drug offenses. Also, 54,336 were incarcerated for public-order offenses, incluging 19,496 for immigration offenses and 24,298 for weapons offenses.
Source: Sabol, William J., PhD, Couture, Heather, and Harrison, Paige M., Bureau of Justice Statistics, Prisoners in 2006 (Washington, DC: US Department of Justice, December 2007), NCJ219416, p. 26, Appendix Table 13."
http://www.drugwarfacts.org/prison.htm
So while I can provide all sorts of boring stuff for you to beat your head against, the fact is..my anecdotal evidence is right on the money.
People generally end up in prison not for dealing, but for using..and our prisons are swelling with illegals.