NYSE EURONEXT

CUSIP: 629491101 Class: COM

SECURIAN ASSET MANAGEMENT, INC's Holding History (CIK: 0001035350)

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

Q3 2013
Shares 21,817 Value ($000) $916 Avg Close — Range —
Q2 2013
Shares 21,680 Value ($000) $898 Avg Close — Range —
Q1 2013
Shares 21,130 Value ($000) $816 Avg Close — Range —
Q4 2012
Shares 21,300 Value ($000) $672 Avg Close — Range —
Q3 2012
Shares 22,344 Value ($000) $551 Avg Close — Range —
Q2 2012
Shares 22,967 Value ($000) $587 Avg Close — Range —
Q1 2012
Shares 23,602 Value ($000) $708 Avg Close — Range —
Q4 2011
Shares 23,740 Value ($000) $620 Avg Close — Range —
Q3 2011
Shares 23,114 Value ($000) $537 Avg Close — Range —