Ron,

Had to go digging around in my old PPMs. Here it is:

Kgs... Odds
0.0... 1.00
0.5... 0.90
1.0... 0.80
1.5... 0.67
2.0... 0.57
2.5... 0.50
3.0... 0.40
3.5... 0.33
4.0... 0.25
4.5... 0.20
5.0... 0.14