The following partial information is taken from the comparative balance sheet of Levi Corporation:

Shareholders equity	12/31/2013	12/31/2012
Common stock, $5 par value; 28 million shares authorized; 23 million shares issued and 17 million shares outstanding at 12/31/2013; and ____million shares issued and ____shares outstanding at 12/31/2012.	$115 million	$85 million
Additional paid-in capital on common stock	528 million	400 million
Retained earnings	205 million	165 million
Treasury common stock, at cost, 6 million shares at 12/31/2013 and 4 million shares at 12/31/2012	(80 million)	(58 million)
Total shareholders equity	$768 million	$592 million

How many of Levi's common shares were outstanding on 12/31/2012?