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PredictorX1 t1_j8n10t1 wrote

It is interesting to fit a trend to this data. The least-squares fit of a 3-parameter logistic (Time = years since 1966) is:

548328.1273 * logistic(0.078376864 * Time - 4.852042189)

...which is over 5 times over-determined and has an apparent proportionate reduction in variance of 98.9%.

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mkaku- t1_j8n3y9p wrote

The last 6 years have been weird in that they have really stayed the same.

Seems like it was strictly quadratic/power up until 2016 or so.

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