pre_text: humana inc . notes to consolidated financial statements 2014 ( continued ) the total intrinsic value of stock options exercised during 2007 was $ 133.9 million , compared with $ 133.7 million during 2006 and $ 57.8 million during 2005 . cash received from stock option exercises for the years ended december 31 , 2007 , 2006 , and 2005 totaled $ 62.7 million , $ 49.2 million , and $ 36.4 million , respectively . total compensation expense related to nonvested options not yet recognized was $ 23.6 million at december 31 , 2007 . we expect to recognize this compensation expense over a weighted average period of approximately 1.6 years . restricted stock awards restricted stock awards are granted with a fair value equal to the market price of our common stock on the date of grant . compensation expense is recorded straight-line over the vesting period , generally three years from the date of grant . the weighted average grant date fair value of our restricted stock awards was $ 63.59 , $ 54.36 , and $ 32.81 for the years ended december 31 , 2007 , 2006 , and 2005 , respectively . activity for our restricted stock awards was as follows for the year ended december 31 , 2007 : shares weighted average grant-date fair value .
post_text: the fair value of shares vested during the years ended december 31 , 2007 , 2006 , and 2005 was $ 3.4 million , $ 2.3 million , and $ 0.6 million , respectively . total compensation expense related to nonvested restricted stock awards not yet recognized was $ 44.7 million at december 31 , 2007 . we expect to recognize this compensation expense over a weighted average period of approximately 1.4 years . there are no other contractual terms covering restricted stock awards once vested. .
table: Shares Weighted Average Grant-Date Fair Value
table: Nonvested restricted stock at December 31, 2006 1,107,455 $45.86
table: Granted 852,353 63.59
table: Vested (51,206) 56.93
table: Forfeited (63,624) 49.65
table: Nonvested restricted stock at December 31, 2007 1,844,978 $53.61
question: Analyse this data from a financial earnings document. considering the years 2005-2007 , what is the average fair value of shares vested , in millions?