What was the change in Total deferred provision between 2018 and 2019?
{"Current: -- Federal": {"2019": -9627, "2018": 1423, "2017": 26550}, "Current: -- State": {"2019": 882, "2018": 12, "2017": 601}, "Current: -- Foreign": {"2019": 18429, "2018": 13772, "2017": 9621}, "Current: -- Total current provision": {"2019": 9684, "2018": 15207, "2017": 36772}, "Deferred: -- Federal": {"2019": 3822, "2018": 4021, "2017": 28297}, "Deferred: -- State": {"2019": -178, "2018": 2363, "2017": -1000}, "Deferred: -- Foreign": {"2019": -2629, "2018": 3636, "2017": -1979}, "Deferred: -- Total deferred provision": {"2019": 1015, "2018": 10020, "2017": 25318}, "Deferred: -- Total provision for income taxes": {"2019": 10699, "2018": 25227, "2017": 62090}}
total_deferred_provision_2019 = df["Deferred: -- Total deferred provision"]["2019"]
total_deferred_provision_2018 = df["Deferred: -- Total deferred provision"]["2018"]
answer = total_deferred_provision_2019 - total_deferred_provision_2018