Month	 Onset
1 	-0.053252264
2 	-0.214179804
3 	-0.417631994
4 	-0.207398923
5 	-0.047617655
6 	-0.003455982
7 	0.0281723564
8 	0.1486633329
9 	0.3819316667
10 	0.3011514826
11 	0.0778607534
12 	0.005231834