freq a;
smpl 1989 1998;
load y;
233.0 243.7 251.0 256.9 260.3 267.3 272.0 278.6 281.2 280.2;
load x;
266.0 279.4 291.1 295.6 297.8 302.2 305.0 305.5 309.1 311.7;
graph x y;
olsq y c x;
end;