data trout;
  input age pcb ;
cards;
1 .6
1 1.6
1 .5
1 1.2
2 2
2 1.3
2 2.5
3 2.2
3 2.4
3 1.2
4 3.5
4 4.1
4 5.1
5 5.7
6 3.4
6 9.7
6 8.6
7 4
7 5.5
7 10.5
8 17.5
8 13.4
8 4.5
9 30.4
11 12.4
12 13.4
12 26.2
12 7.4
;
run;