GET FILE='nhtsa.sav'.
DATA LIST LIST NOTABLE /x y (F1.0) z (F10.0).
VARIABLE LEVEL z (SCALE).
MISSING VALUES x y (9).
BEGIN DATA.
1 1 1
1 2 10
1 9 100
2 1 1000
2 2 10000
2 9 100000
9 1 1000000
9 2 10000000
9 9 100000000
END DATA.
LIST.