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CUSIP: 629491101 Class: COM

NEW YORK STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0000314969)

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

Q3 2013
Shares 521,980 Value ($000) $21,913 Avg Close — Range —
Q2 2013
Shares 527,380 Value ($000) $21,834 Avg Close — Range —