Contributions to our qualified defined benefit pension plans are affected by the actual return on plan assets and the plan’s funded status.
We made the following required and discretionary contributions to our retirement related plans:
## Table 0 ##
(1) Qualified pension plans only.
(2) Includes contributions to supplemental plans of $3 million, $3 million, and $2 million for the years ended December 31, 2011, 2010, and 2009, respectively.
We were not required to make minimum contributions to our qualified pension plans in 2011, 2010, or 2009.
In 2012, we expect to make minimum and discretionary contributions to our qualified pension plans of approximately $153 million and $65 million, respectively, exclusive of any U. S.  Government recoveries.
We will continue to periodically evaluate whether to make additional discretionary contributions.
Other postretirement benefit payments were $33 million, $33 million, and $33 million in 2011, 2010, and 2009, respectively.
Other Sources and Uses of Capital Additional Capital—We expect cash generated from operations in combination with our existing credit facilities to be sufficient to service debt, meet contractual obligations and finance capital expenditures for at least the next 12 months.
In 2011, we issued $1,200 million of senior notes (consisting of $600 million of 6.875% senior notes due in 2018 and $600 million of 7.125% senior notes due in 2021).
We also entered into the Credit Facility with third-party lenders in an amount of $1,225 million, comprised of a $575 million term loan (due in 2016 with a variable interest rate based on LIBOR plus a spread based on our leverage ratio; the current spread, as of December 31, 2011, was 2.75% and may vary between 2.0% and 3.0%), and a $650 million revolving credit facility (maturing in 2016 with a variable interest rate on drawn borrowings based on LIBOR plus a spread based upon our leverage ratio; the current spread, as of December 31, 2011, was 2.75% and may vary between 2.0% and 3.0%; and with a commitment fee rate on the unutilized balance based on our leverage ratio, which fee rate at our current leverage ratio, as of December 31, 2011, was 0.5% and may vary between 0.35% and 0.5%), of which approximately $121 million of letters of credit was issued but undrawn as of December 31, 2011, and the remaining $529 million of which was unutilized at that time.
Financial Arrangements—In the ordinary course of business, we use standby letters of credit issued by commercial banks and surety bonds issued by insurance companies principally to support our self-insured workers’ compensation plans.
At December 31, 2011, there were $121 million of standby letters of credit issued but undrawn and $297 million of surety bonds outstanding related to our operations.
Retirement of Debt—Immediately prior to the spin-off on March 30, 2011, and as of December 31, 2010, we had $715 million of promissory notes payable to Northrop Grumman, together with accrued and unpaid interest totaling $248 million and $239 million as of March 30, 2011, and December 31, 2010, respectively.
In connection with the spin-off, the intercompany debt and accrued interest thereon in their entirety were contributed to our additional paid-in capital by Northrop Grumman.
We made scheduled term loan payments of $22 million in the year ended December 31, 2011, using cash generated from operations.
For a description of our outstanding debt amounts and related restrictive covenants, see Note 13: Debt in Item 8.
We were in compliance with all debt-related covenants as of and during the years ended December 31, 2011 and 2010.
Equity Compensation Plan Information The following table presents the equity securities available for issuance under our equity compensation plans as of December 31, 2013.
## Table 1 ##
(1) Includes grants made under the Huntington Ingalls Industries, Inc.  2012 Long-Term Incentive Stock Plan (the "2012 Plan"), which was approved by our stockholders on May 2, 2012, and the Huntington Ingalls Industries, Inc.  2011 Long-Term Incentive Stock Plan (the "2011 Plan"), which was approved by the sole stockholder of HII prior to its spin-off from Northrop Grumman Corporation.
Of these shares, 818,723 were subject to stock options, 1,002,217 were subject to outstanding restricted performance stock rights, 602,400 were restricted stock rights, and 63,022 were stock rights granted under the 2011 Plan.
In addition, this number includes 24,428 stock rights and 446,117 restricted performance stock rights granted under the 2012 Plan, assuming target performance achievement.
(2) This is the weighted average exercise price of the 818,723 outstanding stock options only.
(3) There are no awards made under plans not approved by security holders.
ITEM 13.
CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE Information as to certain relationships and related transactions and director independence will be incorporated herein by reference to the Proxy Statement for our 2014 Annual Meeting of Stockholders to be filed within 120 days after the end of the Company’s fiscal year.
ITEM 14.
PRINCIPAL ACCOUNTANT FEES AND SERVICES Information as to principal accountant fees and services will be incorporated herein by reference to the Proxy Statement for our 2014 Annual Meeting of Stockholders to be filed within 120 days after the end of the Company’s fiscal year.
volumes in Fleet Support services.
Service revenues at our Newport News segment increased $73 million in 2013, primarily due to higher volumes in Fleet Support and Aircraft Carrier related services.2012 - Product sales in 2012 increased $79 million, or 1%, from 2011.
Product sales at our Ingalls segment decreased by $10 million in 2012, as a result of lower sales volumes in Amphibious Assault Ships, partially offset by higher sales volumes in Surface Combatants and the Legend-class NSC program.
Newport News product sales increased by $89 million in 2012, due to higher sales volumes in Aircraft Carrier programs, partially offset by lower sales volumes in Submarine programs.
Service revenues in 2012 increased $54 million, or 6%, from 2011.
Service revenues at our Ingalls segment decreased by $31 million in 2012, primarily as a result of lower volumes in Surface Combatant support services.
Service revenues at our Newport News segment increased by $85 million in 2012, due to the favorable resolution of outstanding contract changes on the CVN-65 USS Enterprise Extended Drydocking Selected Restricted Availability ("EDSRA"), and higher volumes in Energy services, Aircraft Carrier and Submarine related engineering services, and Fleet Support services.
Cost of Sales and Service Revenues Cost of product sales, cost of service revenues, income from operating investments, net, and general and administrative expenses were as follows:
## Table 2 ##
Cost of Product Sales 2013 - Cost of product sales in 2013 decreased $132 million, or 3%, as compared to 2012.
Cost of product sales at our Ingalls segment decreased $174 million in 2013, primarily due to the impact of hurricane insurance recoveries and lower volumes in Amphibious Assault Ships, partially offset by higher volumes in the Legend-class NSC program and Surface Combatants.
Cost of product sales at our Newport News segment increased $42 million in 2013, primarily due to higher volumes in Aircraft Carriers, partially offset by lower costs on the SSN-774 Virginiaclass submarine program driven by performance improvement, and the absence in 2013 of the workers' compensation expense adjustment recorded in 2012.
Cost of product sales as a percentage of product sales declined from 83.9% in 2012 to 80.9% in 2013, primarily due to the impact of hurricane insurance recoveries, the SSN-774 Virginia-class submarine program, driven by risk retirement, performance improvement and the favorable resolution of outstanding contract changes, as well as risk retirement on the execution contract for the CVN-71 USS Theodore Roosevelt RCOH and the absence in 2013 of the workers' compensation expense adjustment recorded in 2012.2012 - Cost of product sales in 2012 increased $33 million, or 1%, as compared to 2011.
Cost of product sales at our Ingalls segment decreased $26 million in 2012, primarily as a result of the lower sales volumes described above, improved performance on the LPD-17 San Antonio-class program, as well as receipt of $7 million in resolution of a contract dispute with a private party, partially offset by increased workers' compensation expense.
Cost of product sales at our Newport News segment increased $59 million in 2012, primarily due to the higher sales volumes described above and increased workers' compensation expense.
Cost of product sales as a percentage of product sales declined from 84.5% in 2011 to 83.9% in 2012, primarily due to improved overall performance at our Ingalls segment.

<table><tr><td></td><td colspan="3"> Year Ended December 31</td></tr><tr><td> ($ in millions)</td><td> 2011</td><td> 2010</td><td> 2009</td></tr><tr><td>Pension plans</td><td></td><td></td><td></td></tr><tr><td>Minimum</td><td>$0</td><td>$0</td><td>$0</td></tr><tr><td>Discretionary -1</td><td>3</td><td>105</td><td>201</td></tr><tr><td>Other benefit plans</td><td>33</td><td>33</td><td>33</td></tr><tr><td>Total contributions</td><td>$36</td><td>$138</td><td>$234</td></tr></table>
<table><tr><td>Plan category</td><td>Number of Securities to be Issued Upon Exercise of Outstanding Options, Warrants and Rights<sup>-1</sup> (a)(b)</td><td>Weighted-Average Exercise Price of Outstanding Options,Warrants and Rights<sup>-2</sup></td><td>Number of Securities Remaining Available for Future Issuance Under Equity Compensation Plans (Excluding SecuritiesReflected in Column (a)) (c)</td></tr><tr><td>Equity compensation plans approved by security holders</td><td>2,956,907</td><td>$35.01</td><td>2,786,760</td></tr><tr><td>Equity compensation plans not approved by security holders<sup>-3</sup></td><td>—</td><td>—</td><td>—</td></tr><tr><td>Total</td><td>2,956,907</td><td>$35.01</td><td>2,786,760</td></tr></table>
<table><tr><td></td><td colspan="3">Year Ended December 31</td><td colspan="2">2013 over 2012</td><td colspan="2">2012 over 2011</td></tr><tr><td>($ in millions)</td><td>2013</td><td>2012</td><td>2011</td><td>Dollars</td><td>Percent</td><td>Dollars</td><td>Percent</td></tr><tr><td>Cost of product sales</td><td>$4,695</td><td>$4,827</td><td>$4,794</td><td>$-132</td><td>-3%</td><td>$33</td><td>1%</td></tr><tr><td>% of product sales</td><td>80.9%</td><td>83.9%</td><td>84.5%</td><td>—</td><td></td><td>—</td><td></td></tr><tr><td>Cost of service revenues</td><td>888</td><td>802</td><td>777</td><td>86</td><td>11%</td><td>25</td><td>3%</td></tr><tr><td>% of service revenues</td><td>87.1%</td><td>84.2%</td><td>86.4%</td><td>—</td><td></td><td>—</td><td></td></tr><tr><td>Income (loss) from operating investments, net</td><td>14</td><td>18</td><td>20</td><td>-4</td><td>-22%</td><td>-2</td><td>-10%</td></tr><tr><td>General and administrative expenses</td><td>739</td><td>739</td><td>634</td><td>—</td><td>—%</td><td>105</td><td>17%</td></tr><tr><td>% of total sales and service revenues</td><td>10.8%</td><td>11.0%</td><td>9.6%</td><td>—</td><td></td><td>—</td><td></td></tr><tr><td>Goodwill impairment</td><td>—</td><td>—</td><td>290</td><td>—</td><td>—%</td><td>-290</td><td>-100%</td></tr><tr><td>Cost of sales and service revenues</td><td>$6,308</td><td>$6,350</td><td>$6,475</td><td>$-42</td><td>-1%</td><td>$-125</td><td>-2%</td></tr></table>

Question: Which year is Cost of sales and service revenues the lowest?
Answer: 2013