Details of the present value of the defined benefit obligation and the fair value of plan assets are as follows:
| December 31, 2017 | December 31, 2016 | |||||||
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Actuarial obligation at beginning of the year |
830,585 | 654,329 | ||||||
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Current service cost |
271 | 238 | ||||||
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Interest expense |
86,138 | 84,017 | ||||||
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Actuarial (gain) loss arising from financial assumptions |
72,223 | (2,340 | ) | |||||
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Actuarial (gain) loss arising from experience adjustment |
(30,303 | ) | 52,301 | |||||
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Benefits payment |
(56,128 | ) | (55,648 | ) | ||||
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Actuarial obligation at the end of the year |
902,786 | 732,897 | ||||||
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Fair value of plan assets at beginning of the year |
(388,142 | ) | (361,026 | ) | ||||
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Interest income |
(40,577 | ) | (45,453 | ) | ||||
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Earnings on assets greater than discount rate |
(16,634 | ) | (9,151 | ) | ||||
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Contributions paid |
(3,896 | ) | (4,572 | ) | ||||
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Benefit payments |
33,332 | 32,060 | ||||||
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Fair value of plan assets end of the year |
(415,917 | ) | (388,142 | ) | ||||
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Superplus (deficit) for the year |
486,869 | 344,755 | ||||||
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Net defined benefit liability |
486,869 | 344,755 | ||||||
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