pre_text: notes to the audited consolidated financial statements for 2007 , 2006 , and 2005 , total share-based compensation expense ( before tax ) of approximately $ 26 million , $ 29 million , and $ 22 million , respectively , was recognized in selling , general and administrative expense in the consolidated statement of earnings for all share-based awards of which approximately $ 13 million , $ 17 million , and $ 5 million , respectively , related to stock options . sfas no . 123 ( r ) requires that compensation expense is recognized over the substantive vesting period , which may be a shorter time period than the stated vesting period for retirement-eligible employees . for 2007 and 2006 , approximately $ 3 million and $ 8 million , respectively , of stock option compensation expense were recognized due to retirement eligibility preceding the requisite vesting period . stock option awards option awards are granted on an annual basis to non-employee directors and to employees who meet certain eligibility requirements . option awards have an exercise price equal to the closing price of the company's stock on the date of grant . the term life of options is ten years with vesting periods that vary up to three years . vesting usually occurs ratably over the vesting period or at the end of the vesting period . the company utilizes the black scholes merton ( "bsm" ) option valuation model which relies on certain assumptions to estimate an option's fair value . the weighted average assumptions used in the determination of fair value for stock options awarded in 2007 , 2006 , and 2005 are provided in the table below: .
post_text: the volatility rate of grants is derived from historical company common stock price volatility over the same time period as the expected term of each stock option award . the volatility rate is derived by mathematical formula utilizing the weekly high closing stock price data over the expected term . the expected dividend yield is calculated using the expected company annual dividend amount over the expected term divided by the fair market value of the company's common stock . the average risk-free interest rate is derived from united states department of treasury published interest rates of daily yield curves for the same time period as the expected term . sfas no . 123 ( r ) specifies only share-based awards expected to vest be included in share-based compensation expense . estimated forfeiture rates are determined using historical forfeiture experience for each type of award and are excluded from the quantity of awards included in share-based compensation expense . the weighted average expected term reflects the analysis of historical share-based award transactions and includes option swap and reload grants which may have much shorter remaining expected terms than new option grants. .
table: Assumptions 2007 2006 2005
table: Expected volatility rate 20.80% 21.40% 22.90%
table: Expected dividend yield 2.92% 3.24% 3.29%
table: Average risk-free interest rate 4.24% 4.62% 4.48%
table: Expected forfeiture rate 0.75% 0.75% Actual
table: Expected term years 4.40 4.40 5.00
question: Analyse this data from a financial earnings document. in 2007 what was the percent of the shared based compensation associated with stock options