The table shows the projected numbers N (in millions) of people living in the United States.
Year N
2020 341.4
2025 357.5
2030 373.5
2035 389.5
A model for the data is
N = 3.21t + 277.3,
where t represents time in years, with
t = 20
corresponding to the year 2020. According to the model, in what year will the population exceed 470 million? (Round your answer to the nearest year.)