The cost component of the pension benefit corresponding to each year of service is the actuarial present value of the benefit earned in that year. In principle the same amount of pension benefit is attributed to each year of service. If and to the extent that as of the beginning of the year, the present value of the projected benefit obligation differs from the market value of the plan assets or the existing pension provision, the difference is amortized over the average remaining service period of active employees. In the event, however, that at any date the accumulated benefit obligation calculated as the present value of the.
