what is the {determination method} for {Ceuta} has {population} as {84180.0} ?
How was Ceuta's population of 84180 determined?
SELECT ?value WHERE { wd:Q5823 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x,'84180.0')) . ?s pq:P459 ?value}
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q5823> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1082> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <84180.0> .
?statement <http://www.wikidata.org/entity/P459> ?value. 
} 

What census found the population of Ceuta to be 84180?