sample Time data 1 08:00:00 1.8449 2 08:00:30 5.712 3 08:01:00 9.9805 4 08:01:30 17.6319 5 08:02:00 25.9215 6 08:02:30 36.9147 7 08:03:00 49.9014 8 08:03:30 64.8244 9 08:04:00 82.8032 10 08:04:30 100.0112