Explanation of Responses:
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(1)
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These shares were retained by the Company and not issued, in satisfaction of withholding payroll tax requirements applicable to vesting of the Restricted Stock Awards originally granted on February 8, 2016.
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(2)
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These shares were retained by the Company and not issued, in satisfaction of withholding payroll tax requirements applicable to vesting of the Restricted Stock Awards originally granted on February 10, 2017.
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(3)
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These shares were retained by the Company and not issued, in satisfaction of withholding payroll tax requirements applicable to vesting of the Restricted Stock Awards originally granted on March 6, 2015.
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(4)
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The transactions reported on this Form 4 were effected pursuant to a Rule 10(b)5-1 trading plan adopted by the reporting person on November 16, 2017.
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(5)
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The sales price represents the weighted average sales price ranging in price from $217.150 to $218.060. The number of shares sold at each separate price will be made available to the SEC Staff, the issuer, or a security holder of the issuer upon request.
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(6)
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The sales price represents the weighted average sales price ranging in price from $218.260 to $219.000. The number of shares sold at each separate price will be made available to the SEC Staff, the issuer, or a security holder of the issuer upon request.
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(7)
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The sales price represents the weighted average sales price ranging in price from $219.370 to $220.180. The number of shares sold at each separate price will be made available to the SEC Staff, the issuer, or a security holder of the issuer upon request.
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(8)
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The sales price represents the weighted average sales price ranging in price from $220.560 to $221.410. The number of shares sold at each separate price will be made available to the SEC Staff, the issuer, or a security holder of the issuer upon request.
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(9)
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The sales price represents the weighted average sales price ranging in price from $221.680 to $222.660. The number of shares sold at each separate price will be made available to the SEC Staff, the issuer, or a security holder of the issuer upon request.
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(10)
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The sales price represents the weighted average sales price ranging in price from $222.710 to $223.650. The number of shares sold at each separate price will be made available to the SEC Staff, the issuer, or a security holder of the issuer upon request.
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(11)
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The sales price represents the weighted average sales price ranging in price from $223.870 to $224.550. The number of shares sold at each separate price will be made available to the SEC Staff, the issuer, or a security holder of the issuer upon request.
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(12)
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The sales price represents the weighted average sales price ranging in price from $225.310 to $225.850. The number of shares sold at each separate price will be made available to the SEC Staff, the issuer, or a security holder of the issuer upon request.
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(13)
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The sales price represents the weighted average sales price ranging in price from $223.660 to $224.630. The number of shares sold at each separate price will be made available to the SEC Staff, the issuer, or a security holder of the issuer upon request.
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(14)
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The sales price represents the weighted average sales price ranging in price from $224.690 to $225.680. The number of shares sold at each separate price will be made available to the SEC Staff, the issuer, or a security holder of the issuer upon request.
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(15)
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The sales price represents the weighted average sales price ranging in price from $225.740 to $226.490. The number of shares sold at each separate price will be made available to the SEC Staff, the issuer, or a security holder of the issuer upon request.
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(16)
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The sales price represents the weighted average sales price ranging in price from $227.200 to $228.200. The number of shares sold at each separate price will be made available to the SEC Staff, the issuer, or a security holder of the issuer upon request.
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(17)
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The sales price represents the weighted average sales price ranging in price from $228.210 to $229.010. The number of shares sold at each separate price will be made available to the SEC Staff, the issuer, or a security holder of the issuer upon request.
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(18)
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The sales price represents the weighted average sales price ranging in price from $229.265 to $229.420. The number of shares sold at each separate price will be made available to the SEC Staff, the issuer, or a security holder of the issuer upon request.
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