These show disproportionate incarceration rates for black Americans compared to white Americans. Information compiled by The Sentencing Project, Washington, DC   Prepared by the National Narcotics Intelligence Consumers Committee (NNICC) and covering the years 1985-1996. Listed are the top marijuana prices per pound for sensemilla and commercial. NNICC is the government group responsible for compiling drug supply data.   NORML offers a good "State by State List of Marijuana Laws" It also contains legal advice and information for the marijuana user.   Here's a rundown on federal marijuana crimes and penalties. States usually prosecute most marijuana offenses; the federal government may decide to prosecute when acts involve federal property, large quantities (over 50 plants or 50 kilos); the crossing of national borders, and where the investigation was conducted by federal agents.