celanese corporation and subsidiaries notes to consolidated financial statements ( continued ) 2022 amend certain material agreements governing bcp crystal 2019s indebtedness ; 2022 change the business conducted by celanese holdings and its subsidiaries ; and 2022 enter into hedging agreements that restrict dividends from subsidiaries . in addition , the senior credit facilities require bcp crystal to maintain the following financial covenants : a maximum total leverage ratio , a maximum bank debt leverage ratio , a minimum interest coverage ratio and maximum capital expenditures limitation . the maximum consolidated net bank debt to adjusted ebitda ratio , as defined , previously required under the senior credit facilities , was eliminated when the company amended the facilities in january 2005 . as of december 31 , 2005 , the company was in compliance with all of the financial covenants related to its debt agreements . the maturation of the company 2019s debt , including short term borrowings , is as follows : ( in $ millions ) .

Table:
 | total ( in$ millions )
2006 | 155
2007 | 29
2008 | 22
2009 | 40
2010 | 28
thereafter ( 1 ) | 3163
total | 3437
( 1 ) includes $ 2 million purchase accounting adjustment to assumed debt .
17 .
benefit obligations pension obligations .
pension obligations are established for benefits payable in the form of retirement , disability and surviving dependent pensions .
the benefits offered vary according to the legal , fiscal and economic conditions of each country .
the commitments result from participation in defined contribution and defined benefit plans , primarily in the u.s .
benefits are dependent on years of service and the employee 2019s compensation .
supplemental retirement benefits provided to certain employees are non-qualified for u.s .
tax purposes .
separate trusts have been established for some non-qualified plans .
defined benefit pension plans exist at certain locations in north america and europe .
as of december 31 , 2005 , the company 2019s u.s .
qualified pension plan represented greater than 85% ( 85 % ) and 75% ( 75 % ) of celanese 2019s pension plan assets and liabilities , respectively .
independent trusts or insurance companies administer the majority of these plans .
actuarial valuations for these plans are prepared annually .
the company sponsors various defined contribution plans in europe and north america covering certain employees .
employees may contribute to these plans and the company will match these contributions in varying amounts .
contributions to the defined contribution plans are based on specified percentages of employee contributions and they aggregated $ 12 million for the year ended decem- ber 31 , 2005 , $ 8 million for the nine months ended december 31 , 2004 , $ 3 million for the three months ended march 31 , 2004 and $ 11 million for the year ended december 31 , 2003 .
in connection with the acquisition of cag , the purchaser agreed to pre-fund $ 463 million of certain pension obligations .
during the nine months ended december 31 , 2004 , $ 409 million was pre-funded to the company 2019s pension plans .
the company contributed an additional $ 54 million to the non-qualified pension plan 2019s rabbi trusts in february 2005 .
in connection with the company 2019s acquisition of vinamul and acetex , the company assumed certain assets and obligations related to the acquired pension plans .
the company recorded liabilities of $ 128 million for these pension plans .
total pension assets acquired amounted to $ 85 million. .

Question: what portion of the total debt is due within 12 months?
Answer: 4.5%
Calculation: divide(155, 3437)