#month ndat med   sigma peak
200601   14 1.478 0.692 1.3 1.4
200602    5 1.627 1.018 1.4 1.5
200603    3 1.582 0.581 1.3 1.4
200604    3 1.273 0.611 1.0 1.1
200605    2 1.903 0.750 1.5 1.6
200606    0
200607    1 1.663 0.653 1.6 1.7
200608    6 0.854 0.330 0.7 0.8
200609    5 1.333 0.558 1.2 1.3
200610   17 1.314 0.594 1.1 1.2
200611    7 1.619 0.549 1.4 1.5
200612    3 1.476 0.522 1.2 1.3
2006all  66 1.485 0.681 1.1 1.2