in november 2016 , we issued $ 45 million of fixed rate term notes in two tranches to two insurance companies .
principal payments commence in 2023 and 2028 and the notes mature in 2029 and 2034 , respectively .
the notes carry interest rates of 2.87 and 3.10 , respectively .
we used proceeds of the notes to pay down borrowings under our revolving credit facility .
in january 2015 , we issued $ 75 million of fixed rate term notes to an insurance company .
principal payments commence in 2020 and the notes mature in 2030 .
the notes carry an interest rate of 3.52 percent .
we used proceeds of the notes to pay down borrowings under our revolving credit facility .
at december 31 , 2016 , we had available borrowing capacity of $ 310.8 million under this facility .
we believe that the combination of cash , available borrowing capacity and operating cash flow will provide sufficient funds to finance our existing operations for the foreseeable future .
our total debt increased to $ 323.6 million at december 31 , 2016 compared with $ 249.0 million at december 31 , 2015 , as our cash flows generated in the u.s were more than offset by our share repurchase activity and our purchase of aquasana .
as a result , our leverage , as measured by the ratio of total debt to total capitalization , was 17.6 percent at the end of 2016 compared with 14.7 percent at the end of 2015 .
our u.s .
pension plan continues to meet all funding requirements under erisa regulations .
we were not required to make a contribution to our pension plan in 2016 but made a voluntary $ 30 million contribution due to escalating pension benefit guaranty corporation insurance premiums .
we forecast that we will not be required to make a contribution to the plan in 2017 and we do not plan to make any voluntary contributions in 2017 .
for further information on our pension plans , see note 10 of the notes to consolidated financial statements .
during 2016 , our board of directors authorized the purchase of an additional 3000000 shares of our common stock .
in 2016 , we repurchased 3273109 shares at an average price of $ 41.30 per share and a total cost of $ 135.2 million .
a total of 4906403 shares remained on the existing repurchase authorization at december 31 , 2016 .
depending on factors such as stock price , working capital requirements and alternative investment opportunities , such as acquisitions , we expect to spend approximately $ 135 million on share repurchase activity in 2017 using a 10b5-1 repurchase plan .
in addition , we may opportunistically repurchase an additional $ 65 million of our shares in 2017 .
we have paid dividends for 77 consecutive years with payments increasing each of the last 25 years .
we paid dividends of $ 0.48 per share in 2016 compared with $ 0.38 per share in 2015 .
in january 2017 , we increased our dividend by 17 percent and anticipate paying dividends of $ 0.56 per share in 2017 .
aggregate contractual obligations a summary of our contractual obligations as of december 31 , 2016 , is as follows: .

(dollars in millions)
Payments due by period
Contractual Obligations
Total
Less Than1 year
1 - 2Years
3 - 5Years
More than5 years
Long-term debt
$323.6
$7.2
$7.2
$202.9
$106.3
Fixed rate interest
38.6
4.6
8.1
7.2
18.7
Operating leases
37.4
19.5
7.9
4.2
5.8
Purchase obligations
150.8
141.4
5.8
3.6
—
Pension and post-retirement obligations
66.0
0.9
9.5
8.6
47.0
Total
$616.4
$173.6
$38.5
$226.5
$177.8

as of december 31 , 2016 , our liability for uncertain income tax positions was $ 4.2 million .
due to the high degree of uncertainty regarding timing of potential future cash flows associated with these liabilities , we are unable to make a reasonably reliable estimate of the amount and period in which these liabilities might be paid .
we utilize blanket purchase orders to communicate expected annual requirements to many of our suppliers .
requirements under blanket purchase orders generally do not become committed until several weeks prior to our scheduled unit production .
the purchase obligation amount presented above represents the value of commitments that we consider firm .
recent accounting pronouncements refer to recent accounting pronouncements in note 1 of notes to consolidated financial statements. .

Question: Analyse this data from a financial earnings document. what percentage of total aggregate contractual obligations is due to long term debt?
Choices:
0.32917
1.07867
1
524.98378
0.52498
Correct choice index: 4