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CUSIP: 629491101 Class: COM

STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM's Holding History (CIK: 0000938076)

Note: Option positions (PUT/CALL) are excluded.

Q3 2013
Shares 431,774 Value ($000) $18,126 Avg Close — Range —
Q2 2013
Shares 454,667 Value ($000) $18,823 Avg Close — Range —