DATA bio.testcsv;
INFILE DATALINES DSD DLM=",";
INPUT age smoking $; 
/* $ is needed after any variables consisting of characters instead of numbers */
DATALINES;
33,Never
22,Never
53,Former
76,Never
73,Former
56,Former
37,Never
21,Current
30,Current
56,Current
36,Current
79,Current
75,Former
29,Current
61,Former
33,Current
46,Former
59,Never
71,Current
64,Never
63,Current
24,Former
30,Current
65,Never
38,Never
31,Current
49,Never
36,Former
26,Never
43,Former
32,Never
55,Never
45,Never
62,Current
51,Never
85,Former
39,Never
84,Never
59,Current
82,Former
46,Former
28,Never
42,Never
42,Never
35,Former
26,Never
60,Current
78,Former
64,Never
70,Current
37,Never
23,Never
45,Former
56,Current
35,Never
63,Former
41,Current
65,Former
56,Current
38,Never
21,Current
70,Never
87,Never
23,Never
73,Never
30,Never
67,Current
66,Current
87,Never
75,Never
66,Never
57,Never
83,Never
52,Never
30,Never
52,Former
49,Current
67,Never
42,Former
73,Never
46,Former
40,Former
26,Current
63,Never
82,Former
49,Never
43,Never
41,Never
61,Current
30,Never
22,Current
38,Never
72,Current
23,Never
21,Never
28,Current
82,Former
56,Never
49,Current
68,Never
28,Current
43,Current
31,Current
42,Never
81,Never
48,Former
24,Never
57,Current
32,Current
42,Former
85,Current
57,Never
21,Never
31,Former
39,Never
47,Current
61,Former
22,Never
36,Never
67,Current
72,Former
24,Current
45,Never
71,Never
71,Former
61,Never
41,Current
27,Never
81,Never
79,Never
32,Never
61,Never
31,Current
29,Never
23,Never
67,Former
31,Never
61,Never
42,Never
24,Current
24,Never
45,Never
22,Never
40,Never
55,Never
36,Current
39,Former
69,Former
22,Never
23,Never
68,Never
55,Former
71,Former
69,Never
50,Former
74,Never
35,Current
32,Never
87,Former
;
RUN;

PROC PRINT DATA=bio.testcsv (obs=5);
RUN;