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 15, 2017.
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(5)
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The sales price represents the weighted average sales price ranging in price from $217.040 to $218.030. 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 $218.070 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 $218.080 to $219.990. 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 $220.130 to $221.100. 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 $221.230 to $222.230. 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 $222.240 to $223.210. 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 $223.250 to $224.125. 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 $224.270 to $225.270. 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 $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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(14)
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The sales price represents the weighted average sales price ranging in price from $223.380 to $224.355. 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 $224.390 to $225.390. 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 $225.400 to $226.385. 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 $226.470 to $227.300. 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 $227.545 to $228.420. 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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(19)
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The sales price represents the weighted average sales price ranging in price from $228.585 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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