series_id year period value footnote_codes NCU0099570000000 1997 M09 $15.09 NCU0099570000000 1998 M12 $15.72 NCU0099570000000 1999 M09 $15.36 NCU0099570000000 2000 M07 $15.80 NCU0099570000000 2001 M01 $16.23 NCU0099570200000 1997 M09 $18.59 NCU0099570200000 1998 M12 $19.39 NCU0099570200000 1999 M09 $18.78 NCU0099570200000 2000 M07 $19.35 NCU0099570200000 2001 M01 $19.86 NCU0099570200002 1997 M09 $8.08 NCU0099570200002 1998 M12 $8.44 NCU0099570200002 1999 M09 $8.21 NCU0099570200002 2000 M07 $8.47 NCU0099570200002 2001 M01 $8.61 NCU0099570200004 1997 M09 $10.88 NCU0099570200004 1998 M12 $11.41 NCU0099570200004 1999 M09 $11.85 NCU0099570200004 2000 M07 $12.17 NCU0099570200004 2001 M01 $12.38