What was the percentage change in the total liquefaction services revenue between 2018 and 2019?
{"Base tolling fee (1)": {"2019": 204501, "2018": 119677}, "Amortization of deferred commissioning period revenue (2)": {"2019": 4220, "2018": 2467}, "Amortization of Day 1 gain (3)": {"2019": 9950, "2018": 5817}, "Other": {"2019": -575, "2018": -336}, "Total": {"2019": 218096, "2018": 127625}}
total_2019 = df["Total"]["2019"]
total_2018 = df["Total"]["2018"]
answer = ( total_2019 - total_2018 ) / total_2018 * 100.0