human
the weighted average grant date fair value of performance-based restricted stock units granted during the years 2008 and 2007 was $84.33 and $71.72, respectively. the total fair value of performance-based restricted stock units vested during 2009, 2008 and 2007 was $33712, $49387 and $9181, respectively. at september 30, 2009, the weighted average remaining vesting term of performance-based restricted stock units is 1.28 years. time-vested restricted stock units time-vested restricted stock units generally cliff vest three years after the date of grant, except for certain key executives of the company, including the executive officers, for which such units generally vest one year following the employee 2019s retirement. the related share-based compensation expense is recorded over the requisite service period, which is the vesting period or in the case of certain key executives is based on retirement eligibility. the fair value of all time-vested restricted stock units is based on the market value of the company 2019s stock on the date of grant. a summary of time-vested restricted stock units outstanding as of september 30, 2009, and changes during the year then ended is as follows: weighted average grant date fair value.
|  | Stock Units | Weighted  Average Grant  Date Fair Value |
| --------- | --------- | --------- |
| Balance at October 1 | 1,570,329 | $69.35 |
| Granted | 618,679 | 62.96 |
| Distributed | (316,839) | 60.32 |
| Forfeited or canceled | (165,211) | 62.58 |
| Balance at September 30 | 1,706,958 | $69.36 |
| Expected to vest at September 30 | 1,536,262 | $69.36 |
the weighted average grant date fair value of time-vested restricted stock units granted during the years 2008 and 2007 was $84.42 and $72.20, respectively. the total fair value of time-vested restricted stock units vested during 2009, 2008 and 2007 was $29535, $26674 and $3392, respectively. at september 30, 2009, the weighted average remaining vesting term of the time-vested restricted stock units is 1.71 years. the amount of unrecognized compensation expense for all non-vested share-based awards as of september 30, 2009, is approximately $97034, which is expected to be recognized over a weighted-average remaining life of approximately 2.02 years. at september 30, 2009, 4295402 shares were authorized for future grants under the 2004 plan. the company has a policy of satisfying share-based payments through either open market purchases or shares held in treasury. at september 30, 2009, the company has sufficient shares held in treasury to satisfy these payments in 2010. other stock plans the company has a stock award plan, which allows for grants of common shares to certain key employees. distribution of 25% (25%) or more of each award is deferred until after retirement or involuntary termination, upon which the deferred portion of the award is distributable in five equal annual installments. the balance of the award is distributable over five years from the grant date, subject to certain conditions. in february 2004, this plan was terminated with respect to future grants upon the adoption of the 2004 plan. at september 30, 2009 and 2008, awards for 114197 and 161145 shares, respectively, were outstanding. becton, dickinson and company notes to consolidated financial statements 2014 (continued).
Please answer the following question with expressions if necessary.
what is the average of these three years?
assistant
add(33712, 49387), add(#0, 9181), divide(#1, const_3)