Use the model below to estimate the average annual growth rate of a certain​ country's population for​ 1950, 1988, and​ 2010, where x is the number of years after 1900.

y = -0.0000084x^3 + 0.00194x^2 -0.196x + 7.819

The estimated average annual growth rate of the​ country's population for 1950 is enter your response here ___________