query: SELECT ?day (COUNT(DISTINCT ?person) AS ?count)
  WHERE
  {
    ?person wdt:P31 wd:Q5;
            wdt:P27 wd:Q30;
            p:P569/psv:P569 [ wikibase:timeValue ?day; wikibase:timePrecision 11 ].
  }
  GROUP BY ?day
  ORDER BY DESC(?count)
  LIMIT 10