What was the percentage change in the diluted earnings per share between 2017 and 2019?
{"Net income": {"2019": 108616.0, "2018": 13040.0, "2017": 112062.0}, "Basic weighted average common shares outstanding": {"2019": 30271.0, "2018": 33003.0, "2017": 33612.0}, "Dilutive effect of share-based awards and options outstanding ": {"2019": 803.0, "2018": 916.0, "2017": 941.0}, "Diluted weighted average shares outstanding": {"2019": 31074.0, "2018": 33919.0, "2017": 34553.0}, "Earnings per share: -- Basic": {"2019": 3.59, "2018": 0.4, "2017": 3.33}, "Earnings per share: -- Diluted": {"2019": 3.5, "2018": 0.38, "2017": 3.24}}
diluted_earnings_2019 = df["Earnings per share: -- Diluted"]["2019"]
diluted_earnings_2017 = df["Earnings per share: -- Diluted"]["2017"]
answer = (diluted_earnings_2019 - diluted_earnings_2017) / diluted_earnings_2017 * 100.0