What was the percentage change in net cash provided by operating activities from 2018 to 2019?
{"Amounts in thousands of U.S. dollars -- Net cash provided by operating activities": {"2018": 283710, "2019": 317423, "Change": 33713}, "Amounts in thousands of U.S. dollars -- Net cash used in investing activities": {"2018": -692999, "2019": -442978, "Change": 250021}, "Amounts in thousands of U.S. dollars -- Net cash provided by financing activities": {"2018": 368120, "2019": 50066, "Change": -318054}}
net_cash_2019 = df["Amounts in thousands of U.S. dollars -- Net cash provided by operating activities"]["2019"]
net_cash_2018 = df["Amounts in thousands of U.S. dollars -- Net cash provided by operating activities"]["2018"]
answer = (net_cash_2019 - net_cash_2018) / net_cash_2018 * 100.0