what is the {point in time} for {Santiago Metropolitan Region} has {population} as {7112808} ?
When did the population of Santiago Metropolitan Region reach 7112808?
SELECT ?value WHERE { wd:Q2131 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x,'7112808')) . ?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/Q2131> .
?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> <7112808> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

When was the population of Santiago 7112808?