Sales of SUVs (sport utility vehicles) in the United States (in millions) for the years 1990-1999 can be modeled by the quadratic function shown below.

f(x) = 0.016x(squared) + 0.124x + 0.787

Here x = 0 represents 1990, x = 1 represents 1991, and so on. Use the model to approximate sales in 1999.