What was the change in Dilutive effect of employee stock awards in 2019 from 2018?
{"Weighted average shares outstandingbasic": {"2019": 24118, "2018": 24572, "2017": 24487}, "Dilutive effect of employee stock awards": {"2019": 161, "2018": 279, "2017": 290}, "Weighted average shares outstandingdiluted": {"2019": 24279, "2018": 24851, "2017": 24777}, "Net income from continuing operations": {"2019": 53825, "2018": 247360, "2017": 208644}, "Loss from discontinued operations, net of income taxes": {"2019": "\u2014", "2018": -2, "2017": -1522}, "Net income": {"2019": 53825, "2018": 247358, "2017": 207122}}
dilutive_effect_2019 = df["Dilutive effect of employee stock awards"]["2019"]
dilutive_effect_2018 = df["Dilutive effect of employee stock awards"]["2018"]
answer = dilutive_effect_2019 - dilutive_effect_2018