Some thoughts:
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Florida had a striking increase between 2003 and 2008 that isn’t reflected by California or Texas. Did something specific happen in Florida in that timeframe?
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Texas seems to have been on a long-term downward trend until 2013 (while Florida was spiking). The subsequent upward trend is mirrored by Florida, but not California.
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What does “age-adjusted” mean?
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Does “per 100,000” refer to the entire population, or the population under 25? If the former, could some of the differences be accounted for by changing demographics?