The following table presents the calculation of basic and diluted earnings per share for our Common and Class B common stock:


*Years Ended December 31,*	2017		2016		2015
Basic Earnings per Share:
Net income attributable to Watsco, Inc. shareholders	$	208,221	$	182,810	$	172,929
Less: distributed and undistributed earnings allocated to non-vested restricted common stock		17,430		14,806		13,634

Earnings allocated to Watsco, Inc. shareholders	$	190,791	$	168,004	$	159,295

Weighted-average common shares outstanding—Basic		32,824,947		32,582,385		32,435,961

Basic earnings per share for Common and Class B common stock	$	5.81	$	5.16	$	4.91

Allocation of earnings for Basic:
Common stock	$	175,667	$	154,021	$	146,037
Class B common stock		15,124		13,983		13,258

	$	190,791	$	168,004	$	159,295

Diluted Earnings per Share:
Net income attributable to Watsco, Inc. shareholders	$	208,221	$	182,810	$	172,929
Less: distributed and undistributed earnings allocated to non-vested restricted common stock		17,427		14,801		13,626

Earnings allocated to Watsco, Inc. shareholders	$	190,794	$	168,009	$	159,303

Weighted-average common shares outstanding—Basic		32,824,947		32,582,385		32,435,961
Effect of dilutive stock options		37,686		34,119		44,395

Weighted-average common shares outstanding—Diluted		32,862,633		32,616,504		32,480,356

Diluted earnings per share for Common and Class B common stock	$	5.81	$	5.15	$	4.90