This link says that in 2017 EVs accounted for 1.2% of the US auto market in sales numbers [1]. (But half EV sales are in California, so elsewhere the numbers are even worse.)
In 1987, US average fuel economy was 22.0mpg. In 2018, it was 24.9mpg [2]. A 13% improvement in 31 years.
The idea that the US as a whole has made "great strides" in improving fuel economy, and that we therefore need to rethink the gas tax, is ludicrous. Even in California, it is mostly wishful thinking, and it is definitely not the case in New York.
[1] https://www.chicagotribune.com/news/columnists/wisniewski/ct...
[2] Table 3.1 in the 2018 report Excel file, https://www.epa.gov/automotive-trends/download-data-automoti...