Individual string outputs for last few days: 2012/02/01: p1 0.820, p2 0.810, p3 0.670, p4 0.670 2012/02/02: p1 1.100, p2 1.070, p3 1.010, p4 1.040 2012/02/03: p1 0.190, p2 0.190, p3 0.190, p4 0.180