american tower corporation and subsidiaries notes to consolidated financial statements 2014 ( continued ) 3.00% ( 3.00 % ) convertible notes 2014during the years ended december 31 , 2008 and 2007 , the company issued an aggregate of approximately 8.9 million and 973 shares of common stock , respectively , upon conversion of $ 182.8 million and $ 0.02 million principal amount , respectively , of 3.00% ( 3.00 % ) notes . pursuant to the terms of the indenture , holders of the 3.00% ( 3