We sometimes describe the years between 1970-1979 as `seventies (written as 70's)`, 1980-1989 as `eighties (written as 80's)` and so on.


- What is the equivalence in describing `2000-2009`, `2010-2019` and so on?

- I came across the written terms `00's`. If it is a valid written term to describe 2000-2009, how is it spoken?