It's no surprise that China is the world's largest electric vehicle market by far, but this chart above, constructed from DOE data, puts it in stark relief.
By the numbers: "The combined total of light-duty all-electric vehicles (EV) and plug-in hybrid electric vehicles (PHEV) sold in China in 2018 was over 1 million, or 8.1% of the light-duty vehicle market there," via the "fact of the week" from DOE's Vehicle Technologies Office.
"This compared to 386,000 plug-in vehicles sold in Europe and 361,000 plug-in vehicles in the United States — about 2% of the market in both places."