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              [html]<thead><tr><td></td><td></td><tdcolspan="2">Pension Benefits</td><tdcolspan="4">Retiree Health Care Benefits</td></tr><tr><td></td><td></td><td>2012</td><td></td><td>2011</td><td></td><td>2012</td><td></td><td>2011</td></tr></thead><tbody><tr><td>Change in benefit obligation :</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Benefit obligation at beginning of the year</td><td>$</td><td>53.490</td><td>$</td><td>51.114</td><td>$</td><td>4.667</td><td>$</td><td>4.593</td></tr><tr><td>Service cost</td><td></td><td>289</td><td></td><td>460</td><td></td><td>30</td><td></td><td>39</td></tr><tr><td>Interest cost</td><td></td><td>2.047</td><td></td><td>2.232</td><td></td><td>237</td><td></td><td>235</td></tr><tr><td>Plan participants ’ contributions</td><td></td><td>—</td><td></td><td>—</td><td></td><td>47</td><td></td><td>37</td></tr><tr><td>Benefits paid</td><td></td><td>( 4.144 )</td><td></td><td>( 1.856 )</td><td></td><td>( 256 )</td><td></td><td>( 227 )</td></tr><tr><td>Amendments</td><td></td><td>150</td><td></td><td>151</td><td></td><td>—</td><td></td><td>—</td></tr><tr><td>Actuarial loss ( gain ) during year</td><td></td><td>4.179</td><td></td><td>1.389</td><td></td><td>423</td><td></td><td>( 10 )</td></tr><tr><td>Curtailment</td><td></td><td>( 8.860 )</td><td></td><td>—</td><td></td><td>—</td><td></td><td>—</td></tr><tr><td>Benefit obligation at end of year</td><td>$</td><td>47.151</td><td>$</td><td>53.490</td><td>$</td><td>5.148</td><td>$</td><td>4.667</td></tr><tr><td>Change in plan assets :</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Fair value of plan assets at beginning of year</td><td>$</td><td>6.056</td><td>$</td><td>5.229</td><td>$</td><td>—</td><td>$</td><td>—</td></tr><tr><td>Actual ( loss ) gain on plan assets</td><td></td><td>( 30 )</td><td></td><td>984</td><td></td><td>—</td><td></td><td>—</td></tr><tr><td>Employer contributions</td><td></td><td>4.557</td><td></td><td>1.699</td><td></td><td>209</td><td></td><td>190</td></tr><tr><td>Plan participants ’ contributions</td><td></td><td>—</td><td></td><td>—</td><td></td><td>47</td><td></td><td>37</td></tr><tr><td>Benefits paid</td><td></td><td>( 4.144 )</td><td></td><td>( 1.856 )</td><td></td><td>( 256 )</td><td></td><td>( 227 )</td></tr><tr><td>Fair value of plan assets at end of year</td><td>$</td><td>6.439</td><td>$</td><td>6.056</td><td>$</td><td>—</td><td>$</td><td>—</td></tr><tr><td>Funded status at end of year</td><td>$</td><td>( 40.712 )</td><td>$</td><td>( 47.434 )</td><td>$</td><td>( 5.148 )</td><td>$</td><td>( 4.667 )</td></tr></tbody>
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