График частотности: табаков

[{"date": "2011-11-03", "qty": 3}, {"date": "2013-05-07", "qty": 3}, {"date": "2013-05-08", "qty": 3}, {"date": "2014-10-03", "qty": 3}, {"date": "2014-10-04", "qty": 3}, {"date": "2014-10-05", "qty": 3}, {"date": "2016-03-24", "qty": 3}, {"date": "2017-04-20", "qty": 3}, {"date": "2017-05-30", "qty": 3}, {"date": "2017-11-15", "qty": 3}, {"date": "2017-11-27", "qty": 7}, {"date": "2018-03-12", "qty": 18}, {"date": "2018-03-13", "qty": 16}, {"date": "2018-03-14", "qty": 3}, {"date": "2018-03-15", "qty": 8}, {"date": "2018-03-16", "qty": 3}, {"date": "2018-03-19", "qty": 3}, {"date": "2018-03-25", "qty": 4}]