pre_text: ADVANCED ENERGY INDUSTRIES, INC. NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (continued) (in thousands, except per share amounts) NOTE 6. EARNINGS PER SHARE Basic earnings per share (“EPS”) is computed by dividing income available to common stockholders by the weighted-average number of common shares outstanding during the period. The computation of diluted EPS is similar to the computation of basic EPS except that the denominator is increased to include the number of additional common shares that would have been outstanding (using the if-converted and treasury stock methods), if our outstanding stock options and restricted stock units had been converted to common shares, and if such assumed conversion is dilutive. The following is a reconciliation of the weighted-average shares outstanding used in the calculation of basic and diluted earnings per share for the years ended December 31, 2019, 2018 and 2017:
table: Years Ended December 31,
table: 2019 2018 2017
table: Income from continuing operations $56,495 $147,149 $136,101
table: Income from continuing operations attributable to noncontrolling interest 34 86 —
table: Income from continuing operations attributable to Advanced Energy Industries, Inc. $56,461 $147,063 $136,101
table: Basic weighted-average common shares outstanding 38,281 39,081 39,754
table: Assumed exercise of dilutive stock options and restricted stock units 214 271 422
table: Diluted weighted-average common shares outstanding 38,495 39,352 40,176
table: Continuing operations:
table: Basic earnings per share $ 1.47 $ 3.76 $  3.42
table: Diluted earnings per share $ 1.47 $ 3.74 $  3.39
question: Analyse this data from a financial earnings document. What was the change in Diluted weighted-average common shares outstanding between 2018 and 2019?