plot(232.729 - 210.587 *e^(0.000122336*(t-1900))&&427.275-403.548*e^(.000099844*(t-1948)),t=1948..2300)

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.