From 2014 to 2018, the percentage of adults aged 18–24 years who currently smoked cigarettes decreased from 16.7% to 7.8%.
The percentage of adults in this age group who currently used electronic cigarettes increased from 5.1% to 7.6%.
Source: National Health Interview Survey, 2014–2018 data. https://www.cdc.gov/nchs/nhis.htm.