No, it isn't funny. You are once again trying to mislead people by omitting information critical to a correct understanding. You and I hashed out the contradictions in your source for this claim once before. But here you are again, pushing it some more even though it's been debunked.
Drug usage was *NOT* declining, it was going up after the civil war.
You've pointed out that the DEA's conclusion contradicted its data - which impugns only the DEA's ability to draw conclusions, not its data.
Drug usage was *NOT* declining, it was going up after the civil war.
So you keep claiming although the only available numbers say the opposite.
Drugabuse.gov is another source that contradicts your claim =>
The Institute of Medicine estimated that by 1900, perhaps 300,000 Americans were addicted to opiates.
http://www.drugabuse.gov/international/question-2-what-history-opioid-addiction-in-united-states
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The population of the US in 1900 was 76M, which works out to an addiction rate of 0.4%. That is less than the 400,000 estimated addicts in a population of 50M in 1880. That's an addiction rate of 0.8%.
300,000 is < 400,000, and 0.4% is < 0.8%. So addiction WAS declining between 1880 and 1900.