Basic and diluted earnings per share (“EPS”) are calculated using the following weighted average share data (in thousands):

 

		Three months ended
		September 30,
		2019				2018
Weighted average shares outstanding for basic calculation			26,713				26,539
Dilutive effect of stock options and other share-based awards			37				401
Weighted average shares outstanding adjusted for dilution calculation			26,750				26,940

 

Dilutive potential common shares consist of stock options and performance stock units. 

 

As of and stock options to purchase and common shares, respectively, were excluded from the diluted EPS calculations because their inclusion would have been anti-dilutive.

 

As of and the number of performance-based equity award grants excluded from the calculation of diluted EPS was and respectively Performance-based awards are excluded from the calculation of diluted EPS unless the performance criteria are probable of being achieved as of the balance sheet date.