Year Ended December 31,

2020

2019

2018

Basic:

Weighted average common shares outstanding

15,306,174

15,270,154

15,224,886

Net income attributable to common stockholders of National Healthcare Corporation

$

41,871

$

68,211

$

58,964

Earnings per common share, basic

$

2.74

$

4.47

$

3.87

Diluted:

Weighted average common shares outstanding

15,306,174

15,270,154

15,224,886

Dilutive effect of stock options

63,349

89,892

11,940

Assumed average common shares outstanding

15,369,523

15,360,046

15,236,826

Net income attributable to common stockholders of National Healthcare Corporation

$

41,871

$

68,211

$

58,964

Earnings per common share, diluted

$

2.72

$

4.44

$

3.87