Explanation of Responses:
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1)
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Includes 52,714 shares of Common Stock underlying restricted stock units ("RSUs") of the issuer. All of the RSUs vest on the following schedule and are settled on each applicable vesting date: 6,720 RSUs vesting on September 17, 2016, 4,167 RSUs vesting on March 2, 2017, 5,297 RSUs vesting on June 4, 2017, 6,719 RSUs vesting on September 17, 2017, 4,167 RSUs vesting on March 2, 2018, 5,296 RSUs vesting on June 4, 2018, 6,719 RSUs vesting on September 17, 2018, 4,167 RSUs vesting on March 2, 2019, 5,296 RSUs vseting on June 4, 2019 and 4,166 RSUs vesting on March 2, 2020.
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2)
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The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 16, 2015, which plan became effective November 6, 2015.
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3)
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This price represents the weighted average sale price (rounded to the nearest cent) for multiple transactions reported on this line. The prices of the transactions reported on this line ranged from $42.37 to $42.62. Upon request by the Commission staff, the issuer or a security holder of the issuer, the reporting person will undertake to provide full information regarding the number of shares sold at each separate price.
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4)
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This line contains a combination of both time-based and performance-based options which, as of September 16, 2013, were fully vested.
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5)
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This line contains a combination of both time-based and performance-based options which, as of September 16, 2013, were fully vested.
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6)
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All of the options are time-based options which, as of February 8, 2016, were full vested.
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7)
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All of the options are time-based options which, as of March 6, 2013, were full vested.
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8)
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All of the options are time-based options which, as of March 6, 2016, were full vested.
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9)
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The option provides for vesting in equal annual installments on May 6, 2014, May 6, 2015, May 6, 2016 and May 6, 2017.
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10)
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The option provides for vesting in equal annual installments on September 17, 2015, September 17, 2016, September 17, 2017 and September 17, 2018.
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11)
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The option provides for vesting in equal annual installments on June 4, 2016, June 4, 2017, June 4, 2018 and June 4, 2019.
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12)
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The option provides for vesting in equal annual installments on March 2, 2017, March 2, 2018, March 2, 2019 and March 2, 2020.
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