year	month	time	sales
1996	1	1	48.07
1996	2	2	49.95
1996	3	3	49.92
1996	4	4	48.46
1996	5	5	49.48
1996	6	6	48.67
1996	7	7	48.71
1996	8	8	49.01
1996	9	9	49.84
1996	10	10	50.11
1996	11	11	49.52
1996	12	12	50.04
1997	1	13	50.84
1997	2	14	52.69
1997	3	15	51.86
1997	4	16	50.45
1997	5	17	49.93
1997	6	18	50.75
1997	7	19	51.89
1997	8	20	52.75
1997	9	21	51.93
1997	10	22	51.32
1997	11	23	51.85
1997	12	24	53.03