what is the {point in time} for {Peru} has {Human Development Index} as {0.643} ?
At what point in time did Peru have Human Development Index of 0.643
SELECT ?value WHERE { wd:Q419 p:P1081 ?s . ?s ps:P1081 ?x filter(contains(?x,'0.643')) . ?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/Q419> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1081> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <0.643> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

When was Peru's HD Index 0.643?