pre_text: By region of shipment, in the 2019 fourth quarter, Asia Pacific revenues grew sequentially by 10.6%, principally in Imaging, Analog and Microcontrollers, Americas was up by 10.5%, mainly driven by Digital and Power Discrete, and EMEA decreased by 2.0%. On a year-over-year basis, revenues grew 9.9% in Asia Pacific, mainly due to Analog, Microcontrollers and Imaging. In Americas, revenues grew 5.4%, mainly driven by Digital and Power Discrete, while it decreased by 12.8% in EMEA, mainly due to lower sales in Automotive, Power Discrete and  analog.
table: Three Months Ended % Variation
table: December 31, 2019 September 29, 2019 December 31, 2018 Sequential Year-Over-Year
table: (Unaudited, in millions)
table: EMEA $538 $549 $617 (2.0)% (12.8)%
table: Americas 360 326 342 10.5 5.4
table: Asia Pacific 1,856 1,678 1,689 10.6 9.9
table: Total $2,754 $2,553 $2,648 7.9% 4.0%
question: Analyse this data from a financial earnings document. What is the average Americas revenue in 2019 and 2018?