What
about national trends?
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We have these compilation reports going back
to the 1980s, so we can see trends. Again, they aren't
'national' trends, but trends in these accidental
compilations, but where we know about national trends from
other surveys, we can find them in our results, and we can
hope that where we see other trends that we can't compare
with anyone else's research, we can trust them too.
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