What is the change in Revenue from Provider between 2018 and 2017?
{"Revenue: -- Provider": {"2019": 1597115, "2018": 1616022, "2017": 1441212}, "Revenue: -- Veradigm": {"2019": 161216, "2018": 140326, "2017": 69879}, "Revenue: -- Unallocated Amounts": {"2019": 13346, "2018": -6386, "2017": -13383}, "Revenue: -- Total revenue": {"2019": 1771677, "2018": 1749962, "2017": 1497708}, "Gross profit: -- Provider": {"2019": 672206, "2018": 710063, "2017": 674112}, "Gross profit: -- Veradigm": {"2019": 104896, "2018": 100708, "2017": 43817}, "Gross profit: -- Unallocated Amounts": {"2019": -63522, "2018": -86228, "2017": -85130}, "Gross profit: -- Total gross profit": {"2019": 713580, "2018": 724543, "2017": 632799}, "Income (loss) from operations: -- Provider": {"2019": 396724, "2018": 402544, "2017": 426099}, "Income (loss) from operations: -- Veradigm": {"2019": 43996, "2018": 43641, "2017": 23816}, "Income (loss) from operations: -- Unallocated Amounts": {"2019": -465176, "2018": -539237, "2017": -437431}, "Income (loss) from operations: -- Total income (loss) from operations": {"2019": -24456, "2018": -93052, "2017": 12484}}
revenue_provider_2018 = df["Revenue: -- Provider"]["2018"]
revenue_provider_2017 = df["Revenue: -- Provider"]["2017"]
answer = revenue_provider_2018 - revenue_provider_2017