apostrophe in decades
How to write a decade in figures.
Write 1990s, the ’90s. Do not put an apostrophe before the s: not 1990’s. The apostrophe in ’90s marks the omitted 19, and it faces left. Do not write 90’s or 90s’.
Examples
Use She grew up in the 1990s.
Use the music of the ’90s
Avoid the 1990’s
Avoid the 90’s