The 1981 census of Livorno was 175741.
[['24', '1981_CENSUS', '175741'], ['24', 'CITY', 'Livorno'], ['24', 'REGION', 'Tuscany'], ['24', '2001_CENSUS', '156274'], ['24', '1991_CENSUS', '167512'], ['24', '2010_EST.', '161131']]