REPUBLIC SERVICES, INC.  AND SUBSIDIARIES NOTES TO CONSOLIDATED FINANCIAL STATEMENTS, CONTINUED The amounts included in accumulated other comprehensive income on the consolidated statement of financial position that have not yet been recognized as components of net periodic benefit cost at December 31, 2009 are as follows:
## Table 0 ##
The components of the net periodic benefit cost are summarized below:
## Table 1 ##
We determine the discount rate used in the measurement of our obligations based on a model which matches the timing and amount of expected benefit payments to maturities of high quality bonds priced as of the pension plan measurement date.
Where that timing does not correspond to a published high-quality bond rate, our model uses an expected yield curve to determine an appropriate current discount rate.
The yields on the bonds are used to derive a discount rate for the liability.
The term of our obligation, based on the expected retirement dates of our workforce, is approximately ten years.
In developing our expected rate of return assumption, we have evaluated the actual historical performance and long-term return projections of the Plan assets, which give consideration to the asset mix and the anticipated timing of the pension plan outflows.
We employ a total return investment approach whereby a mix of equity and fixed income investments are used to maximize the long-term return of plan assets for what we consider a prudent level of risk.
The intent of this strategy is to minimize plan expenses by outperforming plan liabilities over the long run.
Risk tolerance is established through careful consideration of plan liabilities, plan funded status and our financial condition.
The investment portfolio contains a diversified blend of equity and fixed income investments.
Furthermore, equity investments are diversified across U. S.  and non-U.
S.  stocks as well as growth, value, and small and large capitalizations.
Derivatives may be used to gain market exposure in an efficient and timely manner.
However, derivatives may not be used to leverage the portfolio beyond the market value of the underlying investments.
Investment risk is measured and monitored on an ongoing basis through annual liability measurements, periodic asset and liability studies, and quarterly investment portfolio reviews.
REPUBLIC SERVICES, INC.  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued) $7.7 million, respectively, during 2016, 2015 and 2014 related to net swap settlements for these interest rate swap agreements, which is included as an offset to interest expense in our consolidated statements of income.
For the years ended December 31, 2016, 2015 and 2014, we recognized a (gain) loss of $(6.3) million, $0.8 million and $12.6 million, respectively, on the change in fair value of the hedged senior notes attributable to changes in the benchmark interest rate, with an offsetting loss (gain) of $4.4 million, $(2.3) million and $(14.1) million, respectively, on the related interest rate swaps.
The difference of these fair value changes represents hedge ineffectiveness, which is recorded directly in earnings as other income, net.
Cash Flow Hedges During 2016, we entered into a number of interest rate lock agreements having an aggregate notional amount of $525.0 million with fixed interest rates ranging from 1.900% to 2.280% to manage exposure to fluctuations in interest rates in anticipation of a planned future issuance of senior notes.
Upon the expected issuance of the senior notes, we will terminate the interest rate locks and settle with our counterparties.
These transactions were accounted for as cash flow hedges.
The fair value of our interest rate locks as of December 31, 2016 was determined using standard valuation models with assumptions about interest rates being based on those observed in underlying markets (Level 2 in the fair value hierarchy).
The aggregate fair value of the outstanding interest rate locks as of December 31, 2016 was $20.2 million and was recorded in other long-term assets in our consolidated balance sheet.
As of December 31, 2016, the effective portion of the interest rate locks recorded as a component of accumulated other comprehensive income (loss), net of tax, was $12.2 million.
During 2015, we entered into a number of interest rate lock agreements having an aggregate notional amount of $200.0 million with fixed interest rates ranging from 2.155% to 2.270% to manage exposure to fluctuations in interest rates in anticipation of the planned issuance of the 3.20% Notes.
Upon issuance of the 3.20% Notes, we terminated the interest rate locks and received $1.2 million from the counterparties.
This transaction was accounted for as a cash flow hedge.
As of December 31, 2016 and 2015, the effective portion of our previously terminated interest rate locks, recorded as a component of accumulated other comprehensive loss, net of tax, was $13.4 million and $19.4 million as of December 31, 2016 and 2015, respectively.
The effective portion of the interest rate locks is amortized as an adjustment to interest expense over the life of the issued debt using the effective interest method.
We expect to amortize $1.6 million of net interest expense over the next twelve months as a yield adjustment of our senior notes.
The effective portion of the interest rate locks amortized as a net increase to interest expense during the years ended December 31, 2016, 2015 and 2014 was $9.8 million, $2.5 million and $2.7 million, respectively.10.
INCOME TAXES The components of the provision for income taxes for the years ended December 31 follow:
## Table 2 ##
REPUBLIC SERVICES, INC.  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued) The following table summarizes our outstanding costless collar hedges for OCC as of December 31, 2016:

Tables referenced above, in order (Table 0 first):
<table><tr><td></td><td>Defined Benefit Pension Plan</td><td>Postretirement Healthcare Plan</td><td>Supplemental Executive Retirement Plan</td></tr><tr><td>Accumulated other comprehensive loss (income):</td><td></td><td></td><td></td></tr><tr><td>Net actuarial (gain) loss</td><td>$-29.4</td><td>$-0.4</td><td>$0.1</td></tr></table>
<table><tr><td></td><td colspan="2">Defined Benefit Pension Plan</td><td colspan="2">Postretirement Healthcare Plans</td><td colspan="2">Supplemental Executive Retirement Plan</td></tr><tr><td></td><td>2009</td><td>2008</td><td>2009</td><td>2008</td><td>2009</td><td>2008</td></tr><tr><td>Components of net periodic benefit cost:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Service cost</td><td>$0.2</td><td>$-</td><td>$-</td><td>$-</td><td>$-</td><td>$-</td></tr><tr><td>Interest cost</td><td>20.2</td><td>1.8</td><td>0.2</td><td>-</td><td>0.5</td><td>0.1</td></tr><tr><td>Expected return on plan assets</td><td>-21.4</td><td>-1.7</td><td>-</td><td>-</td><td>-</td><td>-</td></tr><tr><td>Curtailment recognition</td><td>-</td><td>-</td><td>-0.2</td><td>-</td><td>2.0</td><td>0.1</td></tr><tr><td>Net periodic benefit cost</td><td>$-1.0</td><td>$0.1</td><td>$-</td><td>$-</td><td>$2.5</td><td>$0.2</td></tr><tr><td>Weighted average assumptions used to determine net periodic benefit cost:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Discount rate</td><td>5.75%</td><td>6.50%</td><td>5.75%</td><td>6.50%</td><td>5.75%</td><td>6.50%</td></tr><tr><td>Expected return on plan assets</td><td>7.25%</td><td>7.50%</td><td>N/A</td><td>N/A</td><td>N/A</td><td>N/A</td></tr><tr><td>Rate of compensation increase</td><td>4.00%</td><td>4.00%</td><td>N/A</td><td>N/A</td><td>N/A</td><td>N/A</td></tr></table>
<table><tr><td></td><td>2016</td><td>2015</td><td>2014</td></tr><tr><td>Current:</td><td></td><td></td><td></td></tr><tr><td>Federal</td><td>$299.5</td><td>$337.6</td><td>$328.1</td></tr><tr><td>State</td><td>34.6</td><td>38.4</td><td>39.7</td></tr><tr><td>Deferred:</td><td></td><td></td><td></td></tr><tr><td>Federal</td><td>44.9</td><td>91.5</td><td>-13.3</td></tr><tr><td>State</td><td>2.3</td><td>25.2</td><td>7.5</td></tr><tr><td>State deferred benefit - change in valuation allowance</td><td>-1.4</td><td>-10.5</td><td>-3.2</td></tr><tr><td>Uncertain tax positions and interest, and other</td><td>-27.2</td><td>-36.7</td><td>-21.4</td></tr><tr><td>Provision for income taxes</td><td>$352.7</td><td>$445.5</td><td>$337.4</td></tr></table>

Question: As As the chart 1 shows,which year is Interest cost for Defined Benefit Pension Plan the most?
Answer: 2009