You have more than an order of magnitude scatter in your plot, but you write 3 significant figures to your calculated doubling period. Is this precision of value?
Also, your black data appears to have something different going on prior to 2008. It would be worthwhile doing a separate fit to post 2008 data. Eyeballing it, it is longer than 4 year doubling time.
You have more than an order of magnitude scatter in your plot, but you write 3 significant figures to your calculated doubling period. Is this precision of value?
Also, your black data appears to have something different going on prior to 2008. It would be worthwhile doing a separate fit to post 2008 data. Eyeballing it, it is longer than 4 year doubling time.