also subject to financial covenants which require the Company to limit its consolidated total leverage ratio and to maintain a consolidated interest coverage ratio.
The most restrictive covenant is the consolidated total leverage ratio which is limited to 3.5.
The Company was in compliance with its debt covenants throughout the years ended December 31, 2013 and 2012.
On June 6, 2013, the Company completed a public offering of $800 million aggregate principal amount of 2.050% senior unsecured notes due October 1, 2018.
The notes were issued at 99.791% of their principal amount.
Net proceeds of $793.5 million were used to pay off a portion of the outstanding revolver balance under the 2012 Facility.
The notes bear interest at a fixed rate of 2.050% per year, payable semi-annually in arrears on April 1 and October 1 of each year, beginning October 1, 2013.
Roper may redeem some or all of the notes at any time or from time to time, at 100% of their principal amount plus a make-whole premium based on a spread to U. S.  Treasury securities as described in the indenture relating to the notes.
On November 21, 2012, Roper completed a public offering of $400 million aggregate principal amount of 1.850% senior unsecured notes due November 15, 2017 and $500 million aggregate principal amount of 3.125% senior unsecured notes due November 15, 2022.
The notes bear interest at a fixed rate of 1.850% and 3.125% per year, respectively, payable semi-annually in arrears on May 15 and November 15 of each year, beginning May 15, 2013.
Roper may redeem some or all of the notes at any time or from time to time, at 100% of their principal amount plus a make-whole premium based on a spread to U. S.  Treasury securities as described in the indenture relating to the notes.
In September 2009, the Company completed a public offering of $500 million aggregate principal amount of 6.25% senior unsecured notes due September 2019.
The notes bear interest at a fixed rate of 6.25% per year, payable semi-annually in arrears on March 1 and September 1 of each year, beginning March 1, 2010.
Roper may redeem some of all of these notes at any time or from time to time, at 100% of their principal amount, plus a makewhole premium based on a spread to U. S.  Treasury securities.
The Company’s senior notes are unsecured senior obligations of the Company and rank equally in right of payment with all of Roper’s existing and future unsecured and unsubordinated indebtedness.
The notes are effectively subordinated to any of its existing and future secured indebtedness to the extent of the value of the collateral securing such indebtedness.
The notes are not guaranteed by any of Roper’s subsidiaries and are effectively subordinated to all existing and future indebtedness and other liabilities of Roper’s subsidiaries.
On August 15, 2013, $500 million of senior notes due 2013 matured, and were repaid using revolver borrowings from the 2012 Facility.
Other debt includes $8 million of senior subordinated convertible notes due 2034.
Total debt at December 31 consisted of the following (in thousands):
## Table 0 ##
*Shown net of fair value swap adjustment of $5,087.
represents the period of time that options granted are expected to be outstanding.
The risk-free rate for periods within the contractual life of the option is based on the U. S.  Treasury yield curve in effect at the time of grant.
The weighted-average fair value of options granted in 2013, 2012 and 2011 were calculated using the following weighted-average assumptions:
## Table 1 ##
The following table summarizes the Company’s activities with respect to its stock option plans for the years ended December 31, 2013 and 2012:
## Table 2 ##
The following table summarizes information for stock options outstanding at December 31, 2013:
## Table 3 ##
At December 31, 2013, there was $23.7 million of total unrecognized compensation expense related to nonvested options granted under the Company’s share-based payment plans.
That cost is expected to be recognized over a weighted-average period of 2.0 years.
The total intrinsic value of options exercised in 2013, 2012 and 2011 was $28.8 million, $86.0 million and $41.2 million, respectively.
Cash received from option exercises under all plans in 2013 and 2012 was $24.0 million and $56.1 million, respectively
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued) A reconciliation of the beginning and ending amount of gross unrecognized tax benefits is as follows (in thousands):

['

2013	2012
$1.50 billion revolving credit facility	$250,000	$100,000
2013 Notes*	-	505,087
2017 Notes	400,000	400,000
2018 Notes	800,000	-
2019 Notes	500,000	500,000
2022 Notes	500,000	500,000
Senior Subordinated Convertible Notes	8,270	11,594
Other	6,582	5,441
Total debt	2,464,852	2,022,122
Less current portion	11,016	519,015
Long-term debt	$2,453,836	$1,503,107

', '

2013	2012	2011
Weighted-average fair value ($)	37.08	30.25	24.45
Risk-free interest rate (%)	0.86	0.77	1.91
Average expected option life (years)	5.19	5.24	5.34
Expected volatility (%)	36.09	36.51	35.27
Expected dividend yield (%)	0.56	0.58	0.60

', '

Number of shares	Weighted-average exercise price per share	Weighted-average contractual term	Aggregate intrinsic value
Outstanding at January 1, 2012	3,822,662	$ 50.44
Granted	538,100	95.27
Exercised	-1,389,069	40.46
Canceled	-53,498	70.01
Outstanding at December 31, 2012	2,918,195	63.15	6.52	$ 141,029,378
Granted	601,350	117.78
Exercised	-424,945	56.48
Canceled	-106,164	98.74
Outstanding at December 31, 2013	2,988,436	74.00	6.22	$ 193,279,214
Exercisable at December 31, 2013	1,859,725	$ 56.99	4.84	$ 151,929,651

', '

Outstanding options	Exercisable options
Exercise price	Number	Averageexerciseprice	Average remaininglife (years)	Number	Averageexerciseprice
$ 14.09 - 28.17	157,638	$ 23.70	0.2	157,638	$ 23.70
28.17 - 42.26	126,574	41.81	5.2	126.574	41.81
42.27 - 56.34	1,113,058	53.79	4.4	1,113,058	53.79
56.35 - 70.43	96,800	67.88	7.5	45,300	66.71
70.44 - 84.52	453,392	74.63	7.1	278,034	75.21
84.53 - 98.60	419,924	94.00	8.1	130,085	93.91
98.61 - 112.69	48,700	103.41	8.6	9,036	103.64
112.70 - 126.77	547,350	117.03	9.2	-	-
126.78 - 140.86	25,000	131.54	9.6	-	-
$ 14.09 - 140.86	2,988,436	$ 74.00	6.2	1,859,725	$ 56.99

']

Question: What is the growing rate of Average expected option life (years) in the year with the most Risk-free interest rate (%)?
Answer: -0.01873