Here's a link to the NSDUH tables I mentioned: http://www.oas.samhsa.gov/2k2State/html/ch5.htm
I forgot a couple of links.
Here's the age breakdown for use of any illicit drug in America:
http://www.oas.samhsa.gov/nhsda/2k2nsduh/html/Sect1peTabs1to110A.htm#tab1.19b
Here's the age breakdown for use of any illicit drug in America:
http://www.oas.samhsa.gov/nhsda/2k2nsduh/html/Sect1peTabs1to110A.htm#tab1.20b
As you can see by these statistics there is a huge drop off for senior citizens.
If you exclude the District of Columbia and Rhode Island, Alaska is the highest. Maybe he has access to 2003 numbers?