What was the increase / (decrease) in Adjusted EBITDA from 2018 to 2019?
{"Adjusted EBITDA 1": {"2019": 6212, "2018": 5983, "%Chg": 4}, "Deduct (add): -- Depreciation and amortization": {"2019": 2488, "2018": 2211, "%Chg": 13}, "Deduct (add): -- Gain on disposition of property, plant and equipment": {"2019": "-", "2018": -16, "%Chg": -100}, "Deduct (add): -- Restructuring, acquisition and other": {"2019": 139, "2018": 210, "%Chg": -34}, "Deduct (add): -- Finance costs": {"2019": 840, "2018": 793, "%Chg": 6}, "Deduct (add): -- Other income": {"2019": -10, "2018": -32, "%Chg": -69}, "Deduct (add): -- Income tax expense": {"2019": 712, "2018": 758, "%Chg": -6}, "Deduct (add): -- Net income": {"2019": 2043, "2018": 2059, "%Chg": -1}}
adjusted_ebitda_1_2019 = df["Adjusted EBITDA 1"]["2019"]
adjusted_ebitda_1_2018 = df["Adjusted EBITDA 1"]["2018"]
answer = adjusted_ebitda_1_2019 - adjusted_ebitda_1_2018