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https://www.grandviewresearch.com/industry-analysis/e-cigarette-vaping-market
5. United States E-Cigarette & Vape Market 2021: Market Is Expected to Reach $40.25 Billion by 2028-Registering a CAGR of 27.3%
https://www.globenewswire.com/en/news-release/2021/02/24/2181290/28124/en/United-States-E-cigarette-Vape-Market-2021-Market-is-Expected-to-Reach-40-25-Billion-by-2028-Registering-a-CAGR-of-27-3.html