Or it's from another source that gives different metrics obtained every 10 years (e.g. from census) with some extrapolation?
In any case, the differences are small in this instance over the long run, it's the lack of source and other metadata that its more troubling.
In any case, the differences are small in this instance over the long run
The differences in those years are _huge_.
Except if the trend line is based on the other data source, and the peaks on the census data.
They look similar to me. One has less granular data than the other. What exactly are you implying?
Do a quick calculation for me, please.
What percent of 2 million is 500 thousand? Because the errors are 500 thousand on 2-2.5 million. That's a huge amount of error.