График частотности: exxon

[{"date": "2011-09-01", "qty": 5}, {"date": "2012-01-04", "qty": 3}, {"date": "2012-01-05", "qty": 3}, {"date": "2012-04-16", "qty": 8}, {"date": "2012-06-18", "qty": 3}, {"date": "2022-10-11", "qty": 3}]