Edit: Read counter-arguments in comments to this below.
And shadowstats.com puts it to 17.15%:
March 2022 CPI-U annual inflation hit a 40-plus year high of 8.54% [up from 7.87% in February], the steepest inflation pace since December 1981; March 2022 ShadowStats “Corrected” Alternate CPI estimate hit 17.15%, up from 16.05% in February], the steepest inflation rate since June 1947 (in 75 years).