what is the {point in time} for {Baltimore} has {population} as {622104} ?
At what point in time did Baltimore have a population of 622,104 people?
SELECT ?value WHERE { wd:Q5092 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x,'622104')) . ?s pq:P585 ?value}
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q5092> .
?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> <622104> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

When was the population of Baltimore 622,104?