The following table shows the total sale of cars of four companies from 2015 to 2018.

In which year was the total number of cars sold by these four companies taken together the maximum?

total number of cars sold by these four companies taken together in 2015 = 465+472+486+482 = 1905

total number of cars sold by these four companies taken together in 2016 = 375+427+379+419 = 1600

total number of cars sold by these four companies taken together in 2017 = 246+357+236+523 = 1362

total number of cars sold by these four companies taken together in 2018 = 456+357+484+475 = 1772

In the year 2015, the total number of cars sold by these four companies taken together was the maximum.