MINE SAFETY APPLIANCES CO

CUSIP: 602720104 Class: COMMON STOCK

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

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

Q4 2013
Shares 48,334 Value ($000) $2,475 Avg Close — Range —
Q3 2013
Shares 48,334 Value ($000) $2,495 Avg Close — Range —
Q2 2013
Shares 48,234 Value ($000) $2,245 Avg Close — Range —