What was the percentage change in state income taxes that is currently payable in 2019 from 2018?
{"Currently payable: -- Federal": {"2019": 1995, "2018": 1163, "2017": 5617}, "Currently payable: -- State": {"2019": 557, "2018": 114, "2017": 1022}, "Currently payable: -- Foreign": {"2019": 13448, "2018": 107487, "2017": 116022}, "Currently payable: -- ": {"2019": 16000, "2018": 108764, "2017": 122661}, "Deferred and other: -- Federal": {"2019": -407, "2018": 26334, "2017": 1413}, "Deferred and other: -- State": {"2019": 516, "2018": -489, "2017": -153}, "Deferred and other: -- Foreign": {"2019": -9886, "2018": -20414, "2017": -30510}, "Deferred and other: -- ": {"2019": -9777, "2018": 5431, "2017": -29250}, "Deferred and other: -- Provision for income taxes": {"2019": 6223, "2018": 114195, "2017": 93411}}
state_tax_2019 = df["Currently payable: -- State"]["2019"]
state_tax_2018 = df["Currently payable: -- State"]["2018"]
answer = (state_tax_2019 - state_tax_2018) / state_tax_2018 * 100.0