You should see Vietnamese! It's decreasing, but it used to be ~40%! Now it's closer to 30[0].

And don't forget that there's Lee[1], Lee[2], Lee[3], Lee[4], and Lee[5]! Which are all different

[0] https://en.wikipedia.org/wiki/Vietnamese_name

[1] https://en.wikipedia.org/wiki/Lee_(English_surname)

[2] https://en.wikipedia.org/wiki/L%C3%BD_(Vietnamese_surname)

[3] https://en.wikipedia.org/wiki/Lee_(Korean_surname)

[4] https://en.wikipedia.org/wiki/Li_(surname_%E6%9D%8E)

[5] https://en.wikipedia.org/wiki/Li_(surname_%E5%88%A9)

Besides the two you mention, there are ten other Chinese surnames that could be anglicized as Lee, namely 力, 勵, 厲, 栗, 澧, 禮, 立, 酈, 離, and 黎.