The Delhi Electric Vehicle Policy, 2018 notes that sales of new electric cars worldwide surpassed a million units in 2017, with stocks at three million that year.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/beijing-plans-48-lakh-charging-points-2022-delhi-doesn%E2%80%99t-even-know-how-many-e-vehicles-it-has
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/electric-vehicles
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/china
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/norway
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/centre-science-and-environment-cse
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/california
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/netherlands