Intel controls most of the CPU market with its share growing from 77% in 2014 to 82% in 2016, and back at 77% in 2018.
AMD's share fell from 23% in 2014 to 18% in 2016, but it has been on a rise since then to 23% in 2018.
In fact, if we look at Q3 2019 numbers, AMD's share stands at 32%.
This can be attributed to the success of its Ryzen processors, which offer comparable performance for a cheaper price when compared to Intel.
Of late, there has been a shortage of Intel's chips for CPUs, as the company has been focused on ramping up its production to meet the demand for its data center business. This also benefited AMD, as many OEMs started offering Ryzen processor based desktops and notebooks.