Please answer the given financial question based on the context.
Context: changes in our performance retention awards during 2009 were as follows : shares ( thous. ) weighted-average grant-date fair value .
||shares ( thous. )|weighted-averagegrant-date fair value|
|nonvested at january 1 2009|873|$ 50.70|
|granted|449|47.28|
|vested|-240 ( 240 )|43.23|
|forfeited|-22 ( 22 )|53.86|
|nonvested at december 31 2009|1060|$ 50.88|
at december 31 , 2009 , there was $ 22 million of total unrecognized compensation expense related to nonvested performance retention awards , which is expected to be recognized over a weighted-average period of 1.3 years . a portion of this expense is subject to achievement of the roic levels established for the performance stock unit grants . 5 . retirement plans pension and other postretirement benefits pension plans 2013 we provide defined benefit retirement income to eligible non-union employees through qualified and non-qualified ( supplemental ) pension plans . qualified and non-qualified pension benefits are based on years of service and the highest compensation during the latest years of employment , with specific reductions made for early retirements . other postretirement benefits ( opeb ) 2013 we provide defined contribution medical and life insurance benefits for eligible retirees . these benefits are funded as medical claims and life insurance premiums are plan amendment effective january 1 , 2010 , medicare-eligible retirees who are enrolled in the union pacific retiree medical program will receive a contribution to a health reimbursement account , which can be used to pay eligible out-of-pocket medical expenses . the impact of the plan amendment is reflected in the projected benefit obligation ( pbo ) at december 31 , 2009 . funded status we are required by gaap to separately recognize the overfunded or underfunded status of our pension and opeb plans as an asset or liability . the funded status represents the difference between the pbo and the fair value of the plan assets . the pbo is the present value of benefits earned to date by plan participants , including the effect of assumed future salary increases . the pbo of the opeb plan is equal to the accumulated benefit obligation , as the present value of the opeb liabilities is not affected by salary increases . plan assets are measured at fair value . we use a december 31 measurement date for plan assets and obligations for all our retirement plans. .
Question: what is the annual compensation expense for the remaining unvested performance retention awards?
Answer:
16923076.92308