You’ve got a link for that evidence, I’m not going to take the word of a bunch of hysterical nancy boys.
Wikipedia claims otherwise.
http://en.wikipedia.org/wiki/Meth
By 1995, a combination of U.S. regulations and foreign export controls had shut down the supply of ephedrine, the main ingredient of meth at the time. So Mexican drug cartels, which had pioneered the superlabs in California that churned out 80 percent of the nation's meth, began buying huge quantities of ephedrine's chemical sibling, pseudoephedrine.
And if you talk to law enforcement, they will tell you the same. There was a time when there were a lot of labs in houses run by meth heads, but due to the restrictions on pseudoephedrine, they’ve dried up, and it’s mostly supplied by the superlabs or direct from Mexico.
Sure, from your own Wikipedia article :
"The National Drug Threat Assessment 2006, produced by the Department of Justice, found "decreased domestic methamphetamine production in both small and large-scale laboratories", but also that "decreases in domestic methamphetamine production have been offset by increased production in Mexico." They concluded that "methamphetamine availability is not likely to decline in the near term."[35]"
Punks step up to get smacked down. Ha ha ha.