What was the percentage change in the depreciation balance as of 31 December from 1 January in 2019 for vessels and capitalized dry-docking?
{"Cost: -- Balance as of 1 January": {"Vessels and capitalized dry-docking": 43.3, "Land and buildings": "-", "Other plant and operating equipment": "-"}, "Cost: -- Adjustment on transition to IFRS 16": {"Vessels and capitalized dry-docking": "-", "Land and buildings": 9.9, "Other plant and operating equipment": 0.3}, "Cost: -- Additions": {"Vessels and capitalized dry-docking": 1.8, "Land and buildings": 0.5, "Other plant and operating equipment": 0.4}, "Cost: -- Disposals": {"Vessels and capitalized dry-docking": -2.7, "Land and buildings": "-", "Other plant and operating equipment": -0.1}, "Cost: -- Balance as of 31 December": {"Vessels and capitalized dry-docking": 42.4, "Land and buildings": 10.4, "Other plant and operating equipment": 0.6}, "Depreciation: -- Balance as of 1 January": {"Vessels and capitalized dry-docking": 13.4, "Land and buildings": "-", "Other plant and operating equipment": "-"}, "Depreciation: -- Disposals": {"Vessels and capitalized dry-docking": -2.7, "Land and buildings": "-", "Other plant and operating equipment": "-"}, "Depreciation: -- Depreciation for the year": {"Vessels and capitalized dry-docking": 4.8, "Land and buildings": 2.3, "Other plant and operating equipment": 0.2}, "Depreciation: -- Balance as of 31 December": {"Vessels and capitalized dry-docking": 15.5, "Land and buildings": 2.3, "Other plant and operating equipment": 0.2}, "Depreciation: -- Carrying amount as of 31 December": {"Vessels and capitalized dry-docking": 26.9, "Land and buildings": 8.1, "Other plant and operating equipment": 0.4}}
depreciation_balance_2019 = df["Depreciation: -- Balance as of 31 December"]["Vessels and capitalized dry-docking"]
depreciation_balance_2018 = df["Depreciation: -- Balance as of 1 January"]["Vessels and capitalized dry-docking"]
answer = ( depreciation_balance_2019 - depreciation_balance_2018 ) / depreciation_balance_2018 * 100.0