what is the {point in time} for {Botswana} has {population} as {1.9867e+06} ?
When did Botswana have a population of 1,986,700?
SELECT ?value WHERE { wd:Q963 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x,'1.9867e+06')) . ?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/Q963> .
?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> <1.9867e+06> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

Botswana had a population of 1,986,700 in what year?